You know I thought that a business had to provide a restroom to anyone because of the ADA act. (Americans with Disabilities). Thought it was a law. Guess they are above the law.
Any business open to the public DOES have to provide bathroom access for customers, handicapped or not.
Unless it is located in a mall that has public restrooms for all shoppers. You should call your City or Township and let them know about the denial, they can be cited by the Health or code enf. dept. if they don't allow access.