The gym can be useful for many reason. In addition to the ones noted above by BeginnersLuck, I see the gym as a way to repay favors (give chosen people cushy well-paid jobs), to skim money from , a way to wash money, he can buy goods thru it to divert otherwhere. he can offer jobs to people who will no doubt have pressure to join the church, he has the power to take those jobs away, show favoritism, etc.
If the gym is owned by the church, isn't the church owned by Ron? How does that work. I own my cats but if they own a gym, who profits?
I wonder who ultimately has the word on running the gym? let me guess, there is a board of people who are hand-picked by Ron, who have agendas that are closely aligned with his.
Something stinks about this gym and it isn't the smell of dirty socks and sweat.