Most people think the reasonable thing to have done was to buy something to resolve the issue. The men refused.
I have not been following this closely, but I just came to the thought that the reason the men refused the simple request to purchase something was that they expected the investor they were there to meet to buy food for them as they were dealing, and so weren't going to buy something on their own.
-PJ
The cops also asked them to leave and they refused, that’s why they were arrested.
“The basic story is that two black men were waiting...one of the men wanted to use the bathroom and the manager said they had to buy something first.”
It is probably the combination of the waiting and the request to use the facilities that made the manager refuse.
One would have to ask the manager to be sure.