Nazi Bar Problem

The problem when you own a space that if you let certain groups of people in, such as, in this example, Nazis, you'll literally drive everyone else away from your space, so that what started off as a normal, ordinary space will become, essentially, a Nazi bar.

It's not only Nazis — it can be fascists, white supremacists, meth-heads, PUAs, cryptocurrency fanboys — some groups will be so odious to others that they will drive everyone else from your space, so the only solution that you can enact is to ensure that they don't come to your place, even if they're nice and polite and "follow your rules", because while they might, their friends won't, those friends have a history of driving away other people from other spaces.