>It's not two rules in conflict. The rule is you can ask
>anyone to leave your establishment for any reason, except for
>reasons that are in violation of Civil Rights Laws.

Did they ask to use the restroom and were refused (while other patrons made use of the restroom)?

Did that manager ask them if they were gonna order something?

Did he/she tell them they would have to leave if they didn't order something?

Did he/she specifically say to someone that he/she didn't like those scary, black guys in the shop?