We're a loose group of pilots that enjoy winging with each other, flying fighter sweeps in same planes, and occasionally having a "squad night" on saturday or sunday. We're active in the FSO under a joint "USMC / 71 Sqn" unit. We don't really do base capture, unless we have the urge (not often).
We don't require that you only fly 1 plane (for example only P47s) but we often require at least 1 type of spitfire sortie on squad nights. We've got about as many Euros as we do Yanks, and have wide tastes ranging from buffers to spitoon pilots to luftwobbles (leather underwear chaffs!) to p47 lovers to... well you get the idea.
I guess we're in a squadron because it's more fun than not being in one.