I know Wicked has done quite a few charitable donations and sponsorships, although it can be very difficult for adult oriented businesses to do so.
I can recall reading about a bunch of strippers who did a charity event to raise money for some children's ward at a hospital, but once the it was found out where the money came from, the hospital was forced to return the donation after pressure from certain 'community' groups...remember, it's better a child should suffer and die horribly than benefit from money raised by strippers.