I sat down and was eating personal crackers and an...

I sat down and was eating personal crackers and an employee came and asked me about ordering I told her yes and she said she would send the server. The server came and asked me for my order, I told her a water please. She comes back and says her manager said if I don't order anything besides a water since it's free, I can't sit on their tables outside. I told her I didn't get a chance to look at the menu and she repeats herself about me not being able to sit there and goes back inside and doesn't come back out to check on me or say anything for about 45 minutes before I decide I should leave.