As suggested earlier- mind games for all!
We'll be attempting some basic social games, as inspired by http://lesswrong.com/lw/58/build_skills_in_the_right_order/ - simple stuff, like holding eye contact for absurd periods without staring down, and simple enunciation games.
Also, Rejection therapy! I personally expect everyone here to ask to join a strangers board game. Extra points for success!
You need only bring enthusiasm and preparation for awkwardness. Also the desserts here are pretty decent...