After a couple of days of difficulty with getting ahold of the center, I received exactly the response I was hoping to get. I received a letter of apology from the man who would not let us in, and I didn't have to ask for it. Here's what he had to say:
I would like to present my apologies for my actions on Saturday May 30 2009. My actions where done out of selfishness and to please myself and again I am very sorry.
I conducted myself very unprofessionally and was very impolite to the party involved. And I hope that they can raise above this and not act as selfish as I did, by making the Center suffer by them not renting again because I known that we appreciate their business.
So again please accept my apologies I was selfish and unprofessional.
He was spoken to and told that he was not to handle the situation like that, but rather to, next time, contact someone on the chair to figure out what should be done.
Furthermore, the director of the center called me this afternoon and we had a little chat. He told me how unhappy he was that this had happened and that they are working on new policies so that it does not happen again. In addition, they want us to give them a second chance and are going to let us use the room at no charge! Funnily, this was EXACTLY what I wanted to be done about it, and they were responsible (and smart) enough to take the initiative and do it rather than wait for me to ask for it. In addition I'm glad they owned up to what was genuinely bad_service, rather than defend an employee who was certainly in the wrong.