i would think the obvious choice would be the pittsburgh hacker space
but then we would have to pay for the event. personally, i'm in favor of trying to make the event free for all.
let's get the ball rolling in pittsburgh! i have a twitter account ready at: @CryptoPartyPGH
i'd like to see who's interested in attending, venue/topic suggestions, etc. i'm also setting up a blog/forum, so i'll post that soon for greater discussion. let's make this happen!