(TL;DR of my opinion: the penalty thing feels icky to me, and I think we organisers just have to grit our teeth (a lot, sometimes!) and assume a certain number of no-shows. :-/ )
I'm really interested to hear what everyone thinks. At
RailsBridge Cape Town we struggle a lot with this too (although we're still using
meetup, not BT).
We've discussed charging a small refundable-on-arrival fee for attendance. A pro of this approach is that, in theory, this would give "higher quality" RSVPs: people who RSVP Yes have a higher probability of actually turning up. A con of this is that you could get a much smaller number of RSVP Yeses because you're adding a barrier to entry: some people might not be able to pay the fee; they might not see that it gets refunded on arrival so choose not to come; the organising team now has to handle money; it feels against the open, welcoming, <3 ethos of RB. For us, the cons outweigh the pros so we've never implemented this change.
What we are doing is
over-booking slightly. We're basing the amount we overbook on data from previous events. We started by assuming 100% attendance (optimists!), then adjusted a little each time. We always have some no shows, which I mark after the event (
example) so I can keep track of the data. We also often have a few last minute RSVP Yes -> Nos, which we aren't tracking, but should: it can lead to no shows because Waitlist people get bumped, but have made other plans in the meanwhile and can't make it.
What meetup does to try and remind people is to send one email reminder a week before and one email reminder a day before. This seemed to be working for a while, but the effectiveness seems to have tailed off. For other, non-RB, meetups, we've found that a personal mail (sent from an organiser, using meetup because we don't have everyone's email addresses) gets much more response than the automated meetup one. A simple "hey, there are people on the waitlist, can everyone please make sure their RSVP is correct" gets a flurry of updated RSVPs.
For RBCPT specifically, we've been doing a thing that hopefully is having a similar effect.
A week before the workshop, we email students an exercise to do. The one we're using at the moment is
What you know, and what’s your plan?, which is from
Sharon Bowman's awesome
Training From The Back Of The Room (We also do lots of activities on the day). The activity is designed to get them thinking about the workshop before they arrive (and form connections between what they already know and what they will learn), but also serves as a reminder of the workshop and the fact that it's A Thing that People Have Spent Time Organising.
Katherine (and everyone else!) what do you think of all that ^^^ ? :)