What did she do? Spill a coke with ice, fart loudly or wear a Trump shirt? Or all of them?
If you are the owner, you should have the right to dissmiss anybody from your restaurant regardless of reason in my opinion including heritage or skin colour or 23andme results. Or beliefs. Or religion. Whats’o’ever. Hence it is called Your own restaurant. Should do it by maintaining the dignity of each side though IMHO.
You might will have to live with the shit-storm and the loss of income thereafter however. It is called free market.
PS: Just imagine the outcome of such developements. There would be separate restaurants for coke spillers, loud farters and Trump t-shirt wearers. Others for for silent farters and Merkel look-alikes. Other restaurants segregated by race or religious beliefs. Different entrances and table sections for corresponding 23andme results. How to tell: I JUST LOVE the idea. Separatism is the way of the future!
Restaurant chain “some are more equal than others” hahaha. Just like Southpark’s “tolerance camp” episode.