TTMR, call the city rec dept and find out what their agreement is with this instructor. Did you see a sign posted with his hours--did you look for one? If there is none, that would be easy enough to rectify. In this day and age, if there was a sign posted, it may have been vandalized and ripped off. In that case the instructor should show you his agreement or explain it to you.
Folks, you do realize we are only getting one side of the story here don't you?
It would be helpful if the OP would do his homework in this regard before bringing it here--but it's a good warm-up for my keyboarding.
"...the human emotional system was not designed to endure the mental rigors of a tennis match." Dr. Allen Fox