Are the cashiers (store keepers) allowed to guess?

What if two heterosexual people,  friends, of the same sex, go on vacation together?  Who, among many of the places at which they stop, gets to make the 'what are you?' decision?  Right now especially in a couple U.S. states, beware of, you don't look 'normal' to me, their 'normal'.  Lets say they guess wrong, can they be sued for their 'wrong' guess?  One would sure as hell hope so.  Religions teaches Love and Acceptance of those not exactly in 'our image', or it should if it doesn't.  You don't have any 'God' given right to quickly judge others, especially those who do no harm and surprise surprise, mostly likely do many good deeds,  maybe many more than we can say about you 'deciders'..............................marge