There is no right to exclude in business based on arbitrary classifications.<quoted text>
I do not know if the Florist has that right and the court needs to answer if her Free Exercise Clause is being violated. Does the guaranteed right to public access mean the business owner's private right to exclude is violated? How is public access defined by the courts?
Yes, you can refuse to give a loan to someone with a poor credit score, because that is reasonably related to their ability to repay the loan. But you can't refuse to give a loan to someone just because they are gay or tall or wear a hat.
Businesses are required to serve the public without bias.