I am unofficially in about 5 clans, just so I can get in their servers. Back in BLM, I was in the EUA (European Army, Building Clan), Green (No clue what they were, some guy just asked me if I wanted to join), OOF (One that never existed), and a few others.
Of course, they all died.
Now I am in CBC. I still miss the EUA though, they were great builders. CBC is a re-incarnation of EUA I guess, they both did the same things.