Got two groups, one I knew online and one I knew IRL. First one I never really fit in with, they were one of those hacking/trolling groups that I only hung out with because I was a vindictive kid and wanted to learn to mess with people I didn't like (read: whoever was dating my crush at the time). Last time I looked at any of them, they had moved to Twitter and become... well, typical Twitter users.
Second was some people I hung out with toward the tail end of high school. Just lost contact with most of them after we all graduated. I only got contact info for two of them, and I really only talk to one. Rarely, when our work schedules permit it, the three of us will meet up in person.