CC was the first clan I've been in and I never left it, but in the past I used to multiclan (since quite a long time I'm only in CC, I even left the clans like TEC where I've been in for a long time).
Hmm..
TEC (Gale)
LD (Zieg)
UR (Jazz)
TNC (Neo)
FC (Lugia, now Sauron)
There could have been more, but my memory isn't that good.