"Don't most eating establishments have a " we reserve the right to refuse service to anyone" sign?"
So you feel we should go back to a time when you could refuse service because of the color of a person's skin or their ethnicity?
The signs you refer to apply to people if they're drunk, rowdy or don't meet a posted dress code.
I think a privately owned business should have the right to decide for whatever reason who it wants to do business with.