Your women's only gym example is false in that any person must pay a membership fee to be permitted access. It is not open to the general public for its services.
peeking from lurker status cause i have a question based on this part of what you said. What if after this is over, she goes to be a membership based private club/florist with a 5 cents membership fee, could she then refuse a gay wedding? If not then how does a women's only gym hold up?
for the record I think its her right to be a bigot and let people boycott her to failure or she changes. Law suits like this tie up an already crowed legal system. Freedom means some people will be racist/bigots and as long as its not a life providing service, privately owned, and not gov't funded so be it. imo.