When I was an undergrad in a poetry class, I wrote a piece about my jealousy of the Sturgis Rally bikers that came through my home town of Rapid City every August. It seemed like a chance for thousands of complete strangers to identify with each other simply because of the leather they were wearing, the bike they were riding, and the fact that they were all there together. It looked like a sense of community to me, which I felt I was lacking way back in those Rapid City days of being a teenager (and really, what teenager feels like they have "community"?).
But I have found ways of developing all sorts of different communities around me. My latest one is library students. Check out this collection of library student blogs from the Dominican University in Chicago.