You must frequent some quite deplorable places if that is what you experience.
I have to say, I can't remember the last time I experienced such a scene. If I had, I would have turned around and left. I don’t need the risk of getting a virus to tell me those are not the sort of places to go to.
It would be easy to create different rules for different establishments. That said, from a few posts on here, many places are not adhering anyway.