A club for supernaurals. It a place where those who aren't human don't have to hide their true natures. Its a place where supernaurals can mix and mingle without fear. It is a sanctuary for all. No fighting is allowed on the property.
So what do the characters do? Hang out? Is there a war or hunt or end of the world coming on? a chosen one/sacred baby? Unicorns? Are demons popping out of the ground?
@Wraithblade6LOL I am thinking a hang out with drama mostly outside. May all the things you listed. The drama and tension could come from a war and the people coming to the club to escape or hide.