Friday night I went to Joe’s Pub and saw B.A.N.G.S.: made in america, a wonderful dance performance full of sequins and fur, cutoffs and little black dresses, and virtuosic dance-theater movement.  And some nudity.  Yes, I’m writing about naked dancing yet again.  I swear, at most of the dance concerts I attend, the dancers wear their clothes.  But somehow my favorite questions are raised when dancers ask their audiences to consider what it means to take clothes off. Joe’s Pu