He is a coach of a fitness club.

他是一家健身俱乐部的教练。

She wants to join a fitness club.

她想报一个健身班。

Are you a member of fitness club?

你是健身俱乐部的成员吗？

Join a fitness club.

参加健身俱乐部。

She goes to the fitness club to work out.

她去健身俱乐部上班。