I was exaggerating for effect: my friend didn't actually recommend strangers become roommates. Sorry about that. 'Becoming roommates' actually seemed to me a bad suggestion finding a residence to accommodate everyone, timing of people's lives, lifestyle considerations, etc., make it very complicated. Anyway, I approve of your debate idea. I'll include caveats about how tips for being involved hinge on knowing what one wants to get out of LessWrong and the surrounding community.