[wonderwonder]

Its an interesting question, the gay wedding cake case "Masterpiece Cakeshop v. Colorado Civil Rights Commission" was a first test and it seems to say probably not but the final judgement was based on religious freedom. Will probably need another case to determine.

Regarding my personal opinion, I think they should be allowed to deny service to who they want as its a core feature of the business. I think this is different than a say black / white restricted eating areas as the core feature of those business' is to feed people, not to facilitate personal race / sexuality based interactions. Just my opinion though I am sure there are edge cases that would make me pause.