It seems that it's okay for a couple to walk into an estalishment and ask for service, so long as they cannot be profiled as persons living in a way contrary to the shopkeeper's personal beliefs.  So divorced couples get a pass because they cannot visibly be profiled as such. 

This is a pernicious infringement on people's civil liberties.  In the sad old days of  laws banning miscegenation, many people "passing" for white were not denied their civil rights.  Only those who could be profiled from their appearance or their speech or outright admission were subject to such vile constraints as denial of the right to marry, or even to sit at a cafe counter.  

Similarly, gay persons, evidently so from their demeanor or outright admission, should no more be denied their civil rights and treatment equal to all other law-abiding citizens , than those who are evidently in a mixed-race relationship.  

This is applying profiling, exactly analogous to such as upheld segregation.