I'm in a couple S2000 clubs and they are pretty cool... far fewer 18y/o punks in that club than your average civic group.

They do some really cool events and are generally very nice folks (mostly 30's-ish computer geeks like me) - I like hanging out with them - but I prefer the truck club events... because they're a bit more relaxed. Drinking beer around a campfire and playing in the dirt rules