In a typical month, I play pub trivia (Geeks Who Drink), rehearse some music with someone, drink some wine, and cook something that most people wouldn't make from scratch.
I'm dubious about the ability to find a match online, but it does seem like OKC is pretty darn good at ranking people's attractiveness to me at a conceptual level. Having said that, very few first dates have come back to haunt me, so the chances that you would (i.e. haunt me) seem to be pretty low. :p