They apparently believed they had/have the right to sit in someone else's private property uninvited and unwanted until they feel like leaving.

Ace of Spades explores what happened at a Philadelphia Starbucks.

…But this is of course racism because the people being asked to move on were black. Once upon a time, the civil rights movement was dedicated to ensuring that blacks were treated no differently than whites by police and businesses; now it seems dedicated to ensuring they are treated differently — with greater latitude and indulgence.

23. Now Starbucks is saying this was all contrary to their policy and, presumably, anyone who wants to sit in their shops and not order anything and use the bathrooms has the right to do so as long as they like.

24. Starbucks, in other words, has just announced its stores are not stores primarily, but are now privately-funded shelters and bathroom facilities for the homeless. You don’t have to spend a slim dime in the store to sit as long as you please and use the bathrooms.

25. That’ll be great for Starbucks’ business. Their yuppie douchebag clientele love the homeless in the abstract, but we’ll see how much they appreciate their coffee shops being jammed with them, close-up-like, occupying most tables and chairs.

26. I don’t even want to defend Starbucks; I want them to have the full taste of Social Justice Warrior progressivism. If this is the company’s ideology, then they should live that ideology to the full.

Read more here.