Church worship spaces should be used for worship.
In emergencies they can be used as temporary shelters for people who have no place else to go. They should be the last space used after all other rooms have been filled.
Call me old fashioned and a stick in the mud. But it is a space for worship. If you want to exercise then most churches have fellowship halls where you can go.
Oh, and none of those tacky advertisements either. It is a worship space, not an emporium.
Appropriate decorations for religious holy days are ok.
That's in the foyer.
You know; next to the coffee shop.