"Protected class" is a cop out because the question isn't about what the law says but what is moral.
I mean, some nightclubs have immigrants, but nobody goes there because there are too many immigrants.
It's sort of the same thing here with TikTok: on one hand we say that it's bad to ethnically discriminate in nightclubs, on the other hand we don't go to the 'urban' nightclubs, and take it as a good signal when we read the immigrant patrons online complaining about ethnic discrimination.
Provided it's not a matter of a protected characteristic, the idea that you can push your way through the door by law is silly.
They go there to meet people who titilate them, and who don't remind them of how life can go wrong; that's their business in my view.
I know that I'm not attracted to ugly, unhealthy, or elderly people, and it's not wrong to feel that way, it is basically natural; and people who are themselves ugly, unhealthy, or elderly also feel these same things that you find ugly to acknowledge.
I guess you missed the part where I said you can leave them alone.
Some people don't want to see you, and that's their business.