Comment by roel_v

Not op, but

Computing events (so many stereotypically smelly antisocial people)

Fight sports (many wannabe criminals and general low lifes)

Ecological gardening (lots of self righteous hippies)

Then again, I guess if there are so many people I'm not fond of interacting with, maybe it's not them...

(to be fair there are also people in the above groups that are normal, but they're minorities)