I can heartily recommend bouldering for the solitary and antisocial. *g*

See, that is what I would have thought, but the friend who I climb with claims that in reality bouldering brings out the extrovert in people. She made up a bicycle analogy in which trad climbers are mountain bikers who spend all their time outdoors being quiet and not really saying much to each other, whereas bouldering people are like the cool BMX kids who gather round in a big circle and watch each other do tricks.

I don't know if there is any truth in that, but I thought it was an interesting observation.