You don't belong. Their eyes refuse to make contact with any part that is your black you. When forced to confront you and the stereotype that is you, they move seats or simply leave the establishment.
You are bad for business. You don't mean to be this much of a problem- you just want a latte and a chance to take today's instagram selfie.
You scare them away when you take out your smartphone and pose. Apparently, you are not taking a selfie, but rather, unscrupulously filming your white subjects because what else is a black girl supposed to do in a cafe full of white people.
You are charged almost double the amount of money.