As has been said, every fandom has adult sides to it, you seem to be mistaking these aspects of the fur fandom for making up the entire scope of its interests. Much of the fandom is about clean art, writing, music, and costume making. There is a strong sect that are into competitive dance, others are puppeteers, some even write musicals and other theatre pieces. The adult stuff is there, but it's not forced on anyone, and it's only shameful if you make it so. No one is making you look up that type of art. I'd say it's likely they've rented out showings to circumvent common rules about masks (costume heads) and bulky costumes, and maybe to keep away from any potential harassment. You seem to think something is going to happen at these showings. I'll tell you what will happen... they're going to watch the movie and be geeks. It's a fandom like any other.