Gym, but not the one with the running machines.
Gym, with the gymnasts.

There is a national no 1 team, and I want to go train in their club.
I see a girl from my intermediate whom I didn't like, who were stuck up and believed to be a good gymnast, but turns out she is only at a beginner's level.

There is a huge hall with many people, among them gymnasts, and bathrooms... It seems like a food hall, a cafeteria...