Why do you want to work at a gym?

"I want to work at a gym because I have a strong passion for both fitness and wellness, I thoroughly enjoy helping others achieve their exercise and health goals, and I like the sense of community and social interaction that comes with working at a gym" is a good answer to this interview question.

Gyms typically want their staff to be physically fit or at least to enjoy exercise, so you might want to discuss your own exercise habits in this answer. Showing that you get fulfillment and purpose from helping others in a gym environment is another good thing to inject into your reply. You should also highlight what you like about the gym you are applying to in particular.