I feel like a jerk posting off-topic, mostly because I admin so many forums and often have to get on people for doing exactly that...
Personally, I have a whole bunch of Joes -- not NEARLY as many as many people here, I think, but getting together all of my Cobra troops in one shot (heck, ten shots) would be ridiculous. Not only that, I just wouldn't have time to set it up.
My own site is a lot like this; there are a few topics people tend to focus on, but really, it's a bunch of friends just interacting. Real community isn't about staying on topic, it's about people who share similar interests but have unique points of view to share -- which doesn't happen if there are thread nazis hanging around!