I've done a lot of LJ interests searches on a bunch of topics but there are so many communities that it's often hard to find the ones that are the best (better run and more frequently used). I'm interested in communities sort of like The Question Club, although it doesn't have to be about questions and stuff like that. Basically, I'm just looking for fun, interesting, and popular communities to join. I hate stumbling upon a community that looks promising only to discover that it's quite dead. So...
Can you guys suggest some interesting communities?