Right or wrong and I don't go to Starbucks I don't know how common it is to just hang out. If you're in establishment and you're not ordering and they asked you to order or leave. it is what it is. So legally no problems...... Now the question is did they call the police because they were black? We can speculate. My thought is manager wanted them to leave (not arrested) and that's what they called the police. (I bet there is a starbucks policy) The police took the unnecessary step of arresting them. I blame the police for cuffing them if they could have just required them to leave.