I doubt you're looking for actual advice, or anything you don't want to hear... As a business owner, you can choose to refuse service. However, you can't refuse service based on membership of a protected class. The protected classes are: sex, race, age, disability, color, creed, national origin, and religion. You can refuse service. However, if you refuse service because of a person's color (a protected class reason) that would not be allowed. Also if someone were to show that, for example, all person's of a certain color were "coincidentally" refused, that would not be allowed. I wouldn't tell you to do or not do anything. However you'd probably end up quickly on one side of a lawsuit, and I suspect that the law would not be on your side.