Picture going into a restaurant, and before the hostess seats you she says "I'd like to remind you that I love black people".
That's out of place it is. It doesn't offend anyone, it's just an odd thing to say. You may not perceive it so if you're inside the bubble.
So yeah, it can't be assumed businesses are queer friendly because lots of American Christians and conservatives would prefer queer people dead, or at least back in the closet.
I’ve gone into a restaurant and had the hostess tell me they don’t serve gay people.
So I think it can be very contextually relevant for the hostess to say they’re an ally.