1. First of all, you can try to communicate with the gym management to explain the importance of air conditioning to fitness and ask why you don't turn on the air conditioning. If the manager doesn't give a reasonable explanation or solution, you can consider taking other measures.
You can complain to the local industry and commerce department and tell them that the gym doesn't turn on air conditioning. When you complain, you need to provide specific evidence, such as photos or videos, to prove that the gym does not provide the necessary facilities and services.
If you think your rights and interests have been infringed, you can also seek help and advice from consumer associations or lawyers.
No matter what measures are taken, you need to be patient and calm, and at the same time provide sufficient evidence to explain your rights and needs.