TERRIBLE customer service

I am in town for 1 week...my sister gave me 2 3-day guest passes so I could workout with her and my family  while I am in town.  I tried to use the second pass yesterday, and they refused to let me in.  It says no where on the pass that I can't use 2 guest passes.  All 5 people in my family have memberships at this gym, and they wouldn't let me work out.  The guy was very rude.  My father was so mad he is considering switching gyms.