Well I can say that cases explicitly involving people not making wedding cakes for gay couples the bakers have lost. As I mentioned before, I find the case that baking a cake for someone violates their religious freedom utterly unconvincing. A disapproval of gay sex is so far removed from making a cake for a ceremony involving gay people that it's absurd.
I remember in college reading feminist authors who were anti-marriage because it was (allegedly) 'enslavement' of women, subservient, etc. What if some radical feminist owned a bakery and refused to make straight wedding cakes (because patriarchy!) but was OK with gay wedding cakes (because of course). Should her rights be protected by the law? I'd say yes, as long as she wasn't otherwise refusing take any straight people's business. It's not always going to be a religious issue.