Wasn't that place destroyed by Hurricane Ike? They must have rebuilt it.
I'd be content with just writing off their behavior as ignorance if they had told you not to show up when you called ahead. Also, if they were really intimidated by your group, I don't think they would have refused to refund your money when they threw you out. Would they really have gone that far out of their way to piss off people who they believed were violent and contemptuous of the law? I suspect that they, like many businesses I've dealt with in Kemah, were just looking for a way to cheat anyone nieve enough to patronize them.
I have no desire to spend my money in that area anymore, and I certainly won't be going back to Outriggers.