I think you've got to give SWs complete lattitude over their clients, since having sex with someone is lot more intimate than baking a cake for them, but it's an interesting question to be sure. There are private clubs that still are whites only or men only. Augusta National Golf Club just opened up to female memebers 8 years ago and to Blacks about 20 years ago. It's only when something is considered a public accomodation that it's subject to anti-discrimination laws, but there are more and more state laws which make almost everything a public accomodation. It's definitely one of those topics that's kind of right on the line.