# Small steps for better TCS conferences?

Often, when we take part in TCS conferences, we notice some little details that we wish the conference organisers would have taken care of. And when we are organising conferences, we have already forgotten it.

Hence the question: Which small steps we could easily take to improve TCS conferences?

Hopefully, this question could become a resource that we could double-check whenever we are organising conferences, to make sure that we do not repeat the same mistakes again and again...

I am here interested in relatively small and inexpensive details – something that conference organisers could have easily done if only they had thought about it in time. For example, it might be a useful piece of information that could be put on the conference web page well in advance; a five-dollar gadget that may save the day; something to consider when choosing the restaurant for the banquet; the best timing of the coffee breaks; or your ideal design of the conference badges.

We can cover here all aspects of conference arrangements (including paper submissions, program committees, reviews, local arrangements, etc.).

This is a community wiki question. Please post one idea per answer, and please vote other answers up or down depending on how important they are in your opinion.

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One aspect that hasn't been covered much in the answers so far: Can the conference organisers do something to help grad students who are visiting a conference for the first time ever and who don't know anyone yet? –  Jukka Suomela May 8 '11 at 20:59
This is more of a job for the grad students' advisors and mentors. But maybe organize some kind of event for the grad students so they can all get to meet each other, especially if they're not being invited to the banquet? –  Peter Shor May 9 '11 at 15:12
Yes, or even maybe just a room or some simple refreshments for a grad student meetup. –  Suresh Venkat May 9 '11 at 18:21

These three are something of a package deal:

1. Keep prices down: you can get lovely hors d'oeuvres at a $750-per-seat hotel-hosted conference, it is true, but it tends to detract from the intellectual atmosphere you can get with a $100-per-seat university-hosted conference. Also, you don't just get the people attending who deliver talks. Allow students at the university to attend for free;
2. Space parallel sessions, so that people can really move between them;
3. But also encourage interaction between speakers and attendees at parallel sessions beforehand, so that parallel sessions are also autonomous communities. This encourages interaction, and the sense that parallel sessions are moving the discussion in their subfield forward. Some conferences (e.g., the German linguistics conference, DGfS) have taken this to the conclusion of having all parallel sessions be independent workshops.
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+1 for cheaper university-hosted conferences. –  Hsien-Chih Chang 張顯之 May 8 '11 at 13:17
Yes, university-hosted conferences are great. They are not only inexpensive; they also tend to be a lot easier to access (e.g., public transportation works), and they usually have better facilities (good lecture halls that are actually designed for that purpose, working WLAN, etc.). –  Jukka Suomela May 8 '11 at 13:51
+1 because of 1. a hotel conference room or ball room is a terrible place to hear an academic talk. together with cheaper housing and the benefit to local students, it would be a great solution. and theory conferences are not so big to cause logistic nightmares. –  Sasho Nikolov May 8 '11 at 19:08
I strongly agree with this point! I really don't see any good reason why conferences were organized in some expensive hotels in Las Vegas!!! –  Dai Le May 8 '11 at 22:27
One reason that people use hotels is that it's often very hard to get university conference rooms in the middle of the academic year. –  Boaz Barak May 8 '11 at 23:48

A limited number of tables/desks in a quiet room

Problem: Not everybody will attend every session, nor will everybody be staying at the hotel to/in which the conference is nearest/held.

Solution: A few tables, desks, chairs in a quiet room for undisturbed reading, writing, typing, browsing, possibly with power outlets.

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Yes, please ! after all, part of the fun of being at a conference is working/chatting with others. –  Suresh Venkat May 8 '11 at 21:09
a quiet room defeats this purpose... how about a loud room? :) –  Lev Reyzin May 31 '11 at 23:03

Give away USB sticks as proceedings

Yes, the papers are online, but conferences rarely have working wireless in the conference rooms or nearby public areas. CD-ROMs are the current electronic medium of hoice, but a large fraction of people have tablets and netbooks without CD drives. USB drives cost less than dirt, and they work with almost any computer whose name doesn't match the regexp "iP*".

If you don't want to pre-fill each USB stick with the electronic proceedings, let people fill their own sticks with the electronic proceedings, either from a PC (or three) at the registration desk, or from a colleague who already dumped their stick onto some other device.

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iP.* perhaps? –  Peter Taylor May 8 '11 at 6:25
tcsh, not perl. –  JɛﬀE May 8 '11 at 6:42
Glob patterns are not regexps. :) –  Jukka Suomela May 8 '11 at 12:55
or even provide downloads ahead of time. I had this exact problem with CDs recently, since my laptop doesn't have a disk drive. I had to transfer to USB from one of the conference computers and then copy onto my laptop –  Suresh Venkat May 8 '11 at 16:28

On the conference web site, post simple but detailed instructions for getting from the airport to the conference hotel by public transportation.

Don't give dozens of options – just one or two routes that are straightforward and easy to follow. Tell what kind of tickets to buy, from where, how, and how much it should cost. Make sure that the information that you post is actually up-to-date and valid, especially if the conference takes place in summer.

(It might be a good idea to have a look at a Lonely Planet guide book to get a good idea of what information is useful for someone who is visiting the town for the first time.)

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This is especially important when the conference is held in a non-English speaking country and most of the participants will not be able to read instructions written in the local language. –  Robin Kothari May 8 '11 at 21:59
There are several cities in the U.S. where the instructions for public transportation options at the airport are hard enough to decipher that they might as well be in a foreign language. –  Peter Shor May 10 '11 at 17:44

Don't schedule talks about similar topics at the same time.

Self-explanatory. There's no excuse for it.

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This can be quite a hard thing to do, since each attendee has their own definition of similar, so a reasonable excuse is that there's no way around it. But I agree the organizers should make every effort to try. –  Peter Shor May 9 '11 at 15:06

Make sure that WLAN actually works, even if all conference participants log on to it simultaneously during a coffee break.

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Abstract booklets.

Problem: proceedings are now mostly online (a good thing) and I don't feel like uncorking my laptop to see the topic of a paper.

Solution: Supply abstract booklets (some conferences are already doing this). It's a small booklet that lists abstracts in order of presentation and is an easy reference to decide what a talk is about.

Note: this is an interim solution till we all carry around IPads :), but even then having all abstracts summarized in one place is very convenient.

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Alternatively, give away iPads to the attendees. Ain't that the ecological way? :) –  Michaël Cadilhac May 8 '11 at 21:31

Calendar for conference activities

Problem: It's hard to keep track of multiple sessions, and often in a large conference I don't want to attend all the talks, or would like to maintain a special list of talks I'm going to.

Solution: The conference should at a minimum provide a calendar file that can be slotted into google calendar or whatever calendaring app you have on a phone/laptop. The ICS format is pretty standard.

Note: Conferences can go much further - at KDD you logged into a social networking site associated with the conference and could export a customized calendar based on what talks you're interested in. But that requires more infrastructure and money, and is not within the scope of this question.

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Recommend a few good hotels to conference participants

I've been to conferences where the recommended list of hotels had 10+ hotels (or none, with the message "this is a large city with many hotels, feel free to pick any"). While it's nice to have so much choice, first it means that someone who doesn't know the city will have to pick which one is optimal for them. Second, this greatly reduces the chance of being in the same hotel as a lot of other conference attendees.

Instead, conference organizers, who are locals and can evaluate hotel optimality much better than attendees, can recommend something like 3 or 4 hotels at most, based on their price. There should be a cheap option for students and people on a low budget, and another one for those without funding constraints. That way a lot of attendees will end up at the same hotel and have the chance to interact during breakfast, commute to and from the conference together, etc.

Sometimes this suggestion is not feasible when the hotels in the area are small and will get full really fast. I mean to direct this suggestion to conferences where it is feasible to make such recommendations.

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What's your reasoning for saying that locals can evaluate hotel optimality much better than anyone else? Surely locals are less likely to have stayed in the hotels than attendees? –  Peter Taylor May 9 '11 at 12:50
I meant optimality in terms of distance to conference site, how accessible the hotel is from the airport using public transport, how accessible it is from downtown etc. Moreover, I think people who often have invited guests to their university do keep a track of the local hotel scene. I remember I was asked how the hotel was when I visited a research group recently, so that they could decide whether to recommend it to other visitors. –  Robin Kothari May 9 '11 at 12:56
conference sites are not always near universities, in which case the organizers may really not know that much about the hotels (e.g. the relevant people at MIT know quite a bit about the hotels moderately nearby in Cambridge, but possibly not near the Convention Center in Boston). But I agree, they should make an effort to learn. –  Peter Shor May 9 '11 at 14:59

Get rid of 2-column format, and generally streamline paper preparation

Right now the typical TCS paper has 4 different versions:

1) A preliminary full version - this is the version with full proofs you work on before the conference submission, and the one many people post online around the same time as submission.

2) A submission version - this is a version, hastily prepared a couple of days before the deadline, where we convert a nice 30 page paper into a less readable 10 page paper + 20 page appendix by copy/pasting proofs into appendices.

3) Camera-ready version - this is the version in the two column format that actually gets published in the conference. This is obtained by incorporating reviewer feedback and insights we obtained in the meantime into the submission or preliminary full version, and then working to make it compatible with the ugly 2-column format template provided by the conference. (I think there's more or less universal agreement that the 2-column format is ugly, and the only reason it exists is as a remnant from the not so long ago days of printed proceedings.)

4) Journal version - this is a full version that also contains the above feedback and insights, as well as the result of another pass that we submit to a journal. For technical reasons, it's often hard to maintain the same tex file for versions 3 and 4, which means that one needs to duplicate the work in creating these two versions.

Given this, perhaps it's not surprising that many papers don't make it to stage 4, and the most mature version that remains is this ugly 2-column format.

I'd suggest the following changes:

1) As Emanuelle said, submit a full preliminary paper (i.e., version 1) to the conference, with the understanding that the PC is not obligated to read beyond the first 10 pages, and that they generally can use their judgment to skip technical details of the proofs.

This makes it easier for the authors (one less version) and also for the PC, since if they actually want to see the proofs, they don't have to hunt for them in the appendices, and they can always simulate the current situation by just printing the first 10 pages of the submission and ignoring the rest. (Russell Impagliazzo once said that a submission should have no page limit, but just an instruction that for x=1,2,4,8,... reading the first x pages should make the reviewer want to read the next x ones.)

2) For the camera-ready version, use a 1-column format with a minimally intrusive latex template, that will make it easier to keep working with the same file.

In fact, what I would suggest (though it's a bigger change) is to make the camera-ready version a true "extended abstract" by restricting it to 10 pages of single column. Given that your paper is already accepted, and that a version with the full details should be available online, you don't have to waste space in these 10 pages on explaining more details or enumerating all arguments why your paper is great, and you can focus on trying to explain in the simplest possible way the main ideas behind your work. I think a paper in this format will actually be a valuable resource and will justify having one more version on top of the full/journal version. Also, I think the fact that the conference version will be necessarily be without proof details will encourage people to submit to journals.

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It seems to me that the only reason to restrict the length of the camera-ready version is to allow for a full version to be refereed by a journal ? Makes me feel even more convinced that we need to go all-journal. –  Suresh Venkat May 9 '11 at 4:32
As I commented under Emmanuelle's answer, I think should be asked to submit precisely the version of the paper the authors want to appear in the proceedings. (Yes, allow for a round of revision.) Nobody likes to review double-column papers, so get rid of double-column format. Keep the 10-page limits, so reviewing under time pressure stays sane. –  JɛﬀE May 9 '11 at 4:45
The 2-column format is much easier to read than the 1-column on large pages. If you have one line of text in a smallish font across an entire letter-size or A4 page, it is really quite difficult to read. (Smaller pages are much better, but this isn't the size of most conference proceedings.) And in the age of text processing, two-column versus one-column formatting really shouldn't be an issue at all; length is definitely a more relevant thing to worry about. –  Peter Shor May 9 '11 at 14:51
"If you have one line of text in a smallish font across an entire letter-size or A4 page..." — So don't do that, then. Make the pages smaller or the font bigger. –  JɛﬀE May 14 '11 at 4:52
@Jukka: So (1) get rid of printed proceedings, (2) get rid of page limits, (3) go to 1-column, 11-point, bigger-margin format. Good idea, but I think you'll have to do all these things at once. I expect that you'll still need to have some kind of shorter version for the committee members to look at. The other thing is that it used to be true that the sponsoring organizations make a lot of money by selling copies to libraries. You might meet some resistance on that ground (although since libraries are all switching over to electronic media anyway, this would probably be irrational). –  Peter Shor May 14 '11 at 12:52

Don't have multiple web sites for the conference.

If there are many possible URLs, make sure that all of them redirect to the same place. Don't try to maintain multiple sites by manually copying information from one place to another.

This may sound ridiculous – why would anyone set up multiple web sites with different content – but for some reason it seems to be happening all the time. There is the "official" web site with a cool domain name and a fancy layout, but it is too difficult to update it; then another web site is set up, and soon nobody knows which site to check for the latest information.

People don't need fancy web sites; they want to find information.

(If you haven't seen this before, here is a recent example: 1, 2.)

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Keep prices down, but try to include the conference banquet in the student registration fees.

It seems to be all too common that students miss the banquet for a technical reason: the registration fee does not include the banquet. Their instructors and/or universities would be happy to pay the registration fee – whatever it is, and no matter what it includes – but for some reason they refuse to cover any "extra" costs.

A conference banquet could be a great opportunity for students to get to know people, and I feel sorry for the students whenever they miss this opportunity. The extra cost (on top of flights, hotels, registration fees, etc.) would be usually insignificant, so it is mostly just a matter of bureaucracy.

To keep the registration fees reasonable, it is possible to save money somewhere else – things like conference bags are much less important. You can also try to find a company to sponsor the dinner for the students. And the banquet does not need to be that fancy – great food and an amazing location would be a nice extra, but in the end the social aspect is what matters most.

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I think this is against the idea of making conferences cheaper expressed above. –  Kaveh May 10 '11 at 1:14

Have student reps

To address Jukka's supplementary request made in a comment to the question:

Enlist two (or more) people -- one an energetic young researcher (student or post-doc) and one an engaging and extremely experienced academic (professor) -- to co-ordinate activities for early-stage researchers. The former would be responsible for planning drinks and other social events, while the latter can provide careers and research advice, perhaps in a special-purpose session of the conference or possibly at said drinks. (An optional third person could be an industrial contact.)

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this is another interesting idea. the pairing makes a lot of sense. –  Suresh Venkat May 10 '11 at 17:23

Conference submission = arXiv ID.

Nowadays, a conference submission is usually a PDF file. Instead of asking people to submit PDF files, we could easily ask them to just enter the arXiv identifier of the work that they want to submit.

[Of course the arXiv paper must be formatted like a conference submission: approx. 10 pages of text + all missing details in an appendix.]

This would be relatively straightforward to implement, and it would have numerous benefits:

• If a paper is accepted, this way it is guaranteed that a version with full proofs is permanently available somewhere. We would never again have the typical situation that a conference paper claims a result and refers to a future journal version that will never appear.

• All results would be made public much earlier. We could have a faster advancement of TCS, as others could more quickly build on top of earlier work, and less risk of reinventing the wheel many times in parallel. ArXiv gives reliable timestamps, so there is no question of anyone stealing someone else's work.

• Reviewing would more interesting, and there would be fewer ethical issues. Now you would be reviewing something that is already made public. You can perfectly well already start to think how to use the results in your own work, how to improve them, etc.

• When the list of accepted papers is published, it would be trivial to add arXiv links to all accepted papers. This way people could already have a look at the papers that look interesting well in advance before the conference.

Obviously there are some drawbacks, too. Posting your paper on arXiv takes some time. You would actually have to first submit to arXiv, then sleep on it, and finish your conference submission on the following day (if it still looks like a good idea). But I don't think this would necessarily be a bad thing...

(Of course, now it would also be obvious that there would be very little need for any printed proceedings or commercial publishers. After all, the list of accepted papers with arXiv links is, in essence, everything that we need. If someone really wants to get a fancy proceedings book, a local university press could handle it at a low cost. But this is getting off-topic – getting rid of publishers is not a small change that people could implement easily.)

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I find many problems with this proposal. Firstly, it really blurs the distinction between published and unpublished papers. Secondly, I don't think forcing people to make their submissions public before they are published will necessarily benefit the community; I can imagine that many people will not one to do this. It would also provide access to non-definitive versions of papers, which many authors would not be so happy about. One of the benefits of the current reviewing process is to allow papers to be improved before they appear in public. This would be lost with your proposal. –  Dave Clarke May 8 '11 at 12:20
I wouldn't mind having conference proceedings = list of arxiv ids. But I think it should be possible to keep submissions confidential, and doing them as arxiv ids doesn't allow that. –  David Eppstein May 8 '11 at 15:38
@Jukka: I'm a big fan of this idea, but there has to be an escape clause for people who want, for whatever reason, to keep their submissions confidential. Among other reasons: Like it or not, algorithms are patentable. At least in the US, you have 12 months from the date of public disclosure (of any kind) to file for a patent for any invention. Companies have a clear interest in delaying disclosure as long as possible. The current system discloses on the first day of the conference; your system requires disclosure six months in advance. –  JɛﬀE May 9 '11 at 4:49
My reason for wanting confidentiality of conference submissions is not actually for secrecy, or because of any worries that someone will steal my ideas. It's because I generally prefer not to put things up on the arxiv (where they will remain public essentially permanently) until they have undergone at least some amount of peer review. And when I submit a paper to a conference for the first time, it doesn't have that level of review yet. –  David Eppstein May 9 '11 at 5:02
@David: I know the feeling, but I am not sure if this is a reason for or against this proposal. :) If the authors aren't confident that the paper is worth publishing, then perhaps the reviewers shouldn't waste their time reading the paper at all...? Maybe we could more often ask our colleagues to read our manuscripts before submitting to conferences (or arXiv), so that the submissions would be more polished? ArXiv submissions might encourage this. –  Jukka Suomela May 9 '11 at 5:24

Post a printed program near the door of the session room(s).

Sounds like a basic thing, but for some reason most conferences do not do this. It costs nothing, but would be very helpful for answering quick questions such as "Is this the session where I want to go?", "What time the coffee break ends?" without looking at the abstract booklet.

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While I agree that this is important, I find that most conferences I attend already have this practice (including SODA) –  Suresh Venkat May 15 '11 at 3:00
Maybe the schedule of the sessions was posted in SODA this year, but I don't remember seeing the list of actual talks that you will hear if you enter the room. –  Daniel Marx May 15 '11 at 11:40

Do not require "One Full Registration Per Paper." This forbids students from paying student registration if they have a student-authored paper. It seriously offends many, especially since this policy is usually announced after paper acceptance.

Conferences that have done this recently include ISAAC, IWOCA, and COCOA.

I imagine the reason for doing this, particularly in a conference not backed by a professional society, is to guarantee a certain revenue amount. But, it is really the organizer's responsibility to figure out reasonable projections of the student/faculty mix and set registration accordingly.

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I summarised a few thoughts after arranging ALGO 2009, see Post ALGO post: etiquettes and etiquette. If I have to highlight only one idea (not already mentioned on this wonderful thread): visible, legible name tags, together with repeated, strong signals from the organisers to actually wear them. In particular, I think the organisers can ask the bigwigs in the programme committee, the invited speakers, and the steering committee to do so.

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Publish Information about Grants, and Try to Allocate them at Registration

It would be nice to know what grants are available to students, new postdocs, etc., before registering for the conference and purchasing flights. (There's nothing more frustrating than finding out that you've been offered a grant to pay for attendance and accommodation for an entire week after you've planned to attend for a single day and booked flights and hotels accordingly.)

Similarly, it would be nice to get a grant at registration time, if possible, rather than to be given a cheque or cash upon arriving to the conference, or worse, waiting weeks after the conference to receive a cheque. Anti-bonus points for a conference in another country with a different currency.

(I've been to one conference where they didn't process registration payments until the day of the conference, and handed back cheques to those who received grants, so there are alternative ways of handling this.)

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Use specialised software to manage submission of papers, assignment of referees, receipt of referee reports, gathering PC member assessment of reviews, and communication of outcomes.

Conference management software on the Edutech wiki lists some options.

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I cannot imagine a conference not doing this these days. –  Dave Clarke May 8 '11 at 9:11
It seems that most TCS conferences nowadays use EasyChair, and this is a very good thing. Not because EasyChair is perfect, but simply because I only need to learn (and configure) one system. –  Jukka Suomela May 8 '11 at 11:22
Easychair isn't ideal. Personally I prefer HotCRP from a reviewer perspective. –  Suresh Venkat May 8 '11 at 16:26

Do not restrict the length of submissions. Instead, ask authors to make their points within X pages, and inform them of the length of camera-ready versions. While some recent PC have courageously done so, this does not yet seem standard.

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Meh. I'm a much bigger fan of "Accept (and review) papers only in final camera-ready format", or equivalently, "Don't accept papers that won't be published." Of course, if the final camera-ready format doesn't have a page limit, we're all good. –  JɛﬀE May 9 '11 at 4:39
Would it really bankrupt conferences to have either no or a much higher page limit for their proceedings? –  Peter Shor May 9 '11 at 14:55
It might not bankrupt conferences, but it does bankrupt readers! I find that most papers are improved by cutting them to be shorter (up to a certain point, approx 10-12 pages in two-column ACM format). –  Sam Tobin-Hochstadt May 9 '11 at 15:24

During talks, display electronically the time left to the speaker (see videos of TED talks for an example). I used a simple java application in full screen to do so at the last conference I chaired: it would have felt stupid to do it "by hand", keeping an eye on the clock and using papers with "10mns left", "5mns left", "1mn left", "FINISH NOW" written on it.

Bonus: display the overspent time in color flashing after the timer is done.

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My laptop already does this when I'm speaking. –  JɛﬀE May 14 '11 at 4:54
Suresh: same here, that's why the conference organizers should have one per room, rather than the chairs... :) –  Jeremy May 15 '11 at 0:23

Reduce the number of sequential talks. Three half-hour highly technical talks following immediately after one another is hopeless. Nobody can concentrate for that long without a break. Ideally there should be a break after every talk.

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But does it make any sense to have half-hour talks? Isn't 15 + 5 minutes per talk more than enough to advertise your work? You can tell what was the problem that you studied, what was known before your work, what you achieved, what is still open, and give some examples of technical tricks that you used in your proofs. If it sounds interesting, people can read the details in your paper; going through boring technicalities is not really necessary. (Actually, 15 minutes is already enough to bore the audience...) –  Jukka Suomela May 17 '11 at 13:28

Record the talks/lectures and make the videos available online.

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@Rob, recording will all people who want to watch the talk to do so, especially people who are not able to attend it (because of time conflicts or other reasons.) No one is forced to do so, and it does not restrict the way you can interact with the author if you are attending the talk. –  Kaveh Jun 5 '11 at 8:57

Make conference T-shirts using a large collection of figures from the papers. (ACM SCG has done this twice in its 25 years; know any other conferences that have?)

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I think tee shirts and other swag are a waste of money. I end up giving away the conference swag I get to charity. –  Rob May 8 '11 at 17:30
Building community spirit is not a waste of money. –  JɛﬀE May 9 '11 at 4:52
I like the T-shirts and wear them at home and at other conferences (as long as they're not white — I don't care for white T-shirts). In fact, I'm wearing one now. I much prefer them to the tote bags or pens one gets so often at these things. I think that when people wear them it makes them feel more strongly that there's a community that they belong to, and therefore makes them more likely to come back to the same conference the next time. –  David Eppstein May 9 '11 at 5:08

If you use conference bags, make them recyclable or reusable:

If you need a bag to give registrants, then you are giving out too much stuff---everyone just throws it away and often hotels do not even have paper recycling! Still, if you do use a cloth bag then choose a useful design, for example a grocery shopping bag. If you use a plastic bag, then ask the hotel for plastic recycling bins.

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Put the deadline on Friday. This will make many significant others happier.

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1. Submission deadlines: I understand that there are different reasons for different submission deadlines, such as flaky servers that need personal attention. Whatever the deadline is, though, post it clearly and convert it to a familiar time zone for most of your submitters (such as Eastern time, or ET, in the US). A good philosophy for conference websites is that if you can save n people each 1 search query, then please do!

2. Registration deadlines: For early registration deadlines , the only rational deadline is the end of the day, in any time zone. That is what is announced on blogs and gets put in calendars. There is no reason to make it 3pm ET (ahem).

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Include among important dates the date for special issue invitations.

Otherwise, how long are authors supposed to wait for?

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(this is not specific to TCS conferences, but would work for better conferences in general)

A nice idea I saw in a mathematical conference for young researchers is asking every participant to write a short "research statement" - in case of junior participants who don't yet have much results, a description of interests would be OK. Then, some time before the conference, the statements are published on the webpage. A working example of this: http://bcc.impan.pl/12Young/uploads/statements.pdf (conference in geometric group theory)

I think this would be especially helpful for junior participants suffering from the "I don't know anyone here" problem, but also the other way, since even students aren't anonymous mass anymore. Of course, this is rather feasible for smaller conferences/workshops, not 400-people events, but still I think it's worth implementing.

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Encourage CouchSurfing as an accommodation

I am not saying to bind people to CouchSurf, however imagine that with the hotel recommendation you add a page where local researchers (or student as I imagine this would be mainly used by students) could post a message saying "I can host so many people, mail me".

Only people ready to do it would use it. For example, for students going to the conference it may be a good way to:

• Lower the entrance fees (you do not pay for accommodation) (for the couchsurfer)
• Not a random CouchSurfing, meet people from the field, have a better interaction (for both couchsurfer and host)
• Visit the places to see in the city with someone that knows it, enjoy it to the fullest.

I imagine that this can be a lot of work to do from scratch, however it may be possible to have an organization specialized in CS to do this for the conference organizer since it does some advertising for them with not a lot of work. Win-win.

I know that this will not be used by every one, but I believe that those using it will really benefit from it (personnal experience, I always had a great time CS).

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