This is anecdotal but I have seen this as a gay man living in Ohio. My whole family is from the sticks but I live just outside a major city now. There’s a pizza place back home that my fiance and I can’t go to because they won’t serve him (he is, admittedly, quite fabulous). I can go alone, because I blend in, but him they will just quietly ignore and occasionally glance over to check if he’s gotten the hint yet. No yelling, no epithets, but no service either.