Can't speak for the leaders or officers in charge of recruiting and admittance but Academy and Asylum are fairly full (there is one opening now as we speak but that might be held, you'd have to contact upper management
), there is more space available in Arrow and it suits the lower end of ranks (if that is your situation, there are higher ranks in there as well if not) so it may be worth checking them out as well.
That being said, I'd strongly advocate joining this legion, fun and chatty group of people with good personalities and desires to help one another. Little bit of structure to some of the aspects of participation, but always encouraging your own method of play. Besides, who wouldn't like a group of people that know the game well, but don't take themselves too seriously (our base is called "Clippy Clops Book Fort" for heavens sake
)