Job qualifications is not job discrimination.
Hooters has one simple qualification. Breasts. Preferably, big ones. Sexism? Yes. Discrimination? No.
If the men want to be a waiter there, then they need to have the proper qualifications.
Imo, they should just make their own restaurant. They could call it Bowling Balls. Or Snakes. Or the Hard Wood Cafe. Or any euphism they want to. (The list of euphemisms they could use is very long. Its so long, that it would be very hard for them to choose one to use.)