When I give talks about Internet subcultures I like to say that I could devote the entire talk to on-line forums for retired Spanish-speaking transvestites. That’s how niched groups a global communication network makes possible.
Myself, I’m on a Swedish site for skeptics, a US site for science bloggers and two sites for boardgame geeks (in English and Swedish). And now Dear Reader Tsu Dho Nihm tells me that there’s a beer geek site with a huge reviews database: Beer Advocate. Awesome! Beer as culture, beer as baseball stats, beer as philately. Though an abstainer myself, I highly recommend this site to all passionate ale heads out there.