The club is rather simple, and does well because people don't THINK about the other meanings, anyone can come in, but if you don't happen to be an endangered species you are served up to be EATEN by them, many MANY wealthy folk who think they'll have a chance to savor panda get eaten by the same, sometimes whole, sometimes carved up
Sometimes when non endangered folks arrive they are offered a menu, which of course just has the names of the endangered species waiting for a meal.. urp
Sentient or not, the only requirements are the rarity of a species..

(might end up redoing this one because i like the concept