Bouncer,
Just a thought:
The gym may only be a tenant of the building. That is, the property is owned and managed by another party. Hence, before you begin an e-mail campaign against the gym, get all of the facts.
If the attendant is employed by another party other than the gym, ask him for the name of the company and contact them via telephone. I believe that people are inherently good for the most part and if there is some sort of accomodation that they're not aware is needed, they may appreciate you for bringing to their attention and will see to it at once.
All my best,
Prince of a guy