Not often but yes. We only refuse service in two situations. The first is when someone is unnecessarily rude. We love our customers and if we can’t help the situation and we(the staff) are still treated in a rude or condescending way, then we ask people to leave and tell them they’re welcome to come back when they can behave in a respectful manner.
The second is when someone changes prices on an item. I won’t deal at all as this is a form of theft.