I think most members have AK by now but a some don't really like it. I think 1 server is running AK maps and it's empty most of the time.
Personally I don't mind a game of conquest or tank dom. but I think the rush games are terrible with the AC130 in it.
You can just send invites to whoever is online to get into game with you and I'm sure a lot will be upto a few rounds on AK maps.