What a beat up this story is.
Any cafe should be within its rights to ask people to buy something if they want to either use the bathroom or even just hang out in the place.
Why did they have to wait for their friend before buying a coffee?
It seems they had actually been asked to leave and refused so they can hardly complain if the manager then calls the po-po.
Seems like a staged politcal pantomime.
I had a date with an Iranian lady (my second ever lady doctor) a while back and I was waiting for her in the cafe and wanting to see if she would order alcohol before I ordered a beer (always feels funny drinking a beer if the girl is drinking coffee) but the waiter said I needed to order something as the cafe was busy so I did.
If only I had been black I could have pulled this victim stunt.