R.J.
**Good** gymnastics gyms UNIVERSALLY smell like chalk and high impact floor mats. There's also the prepuberty sweat smell (kind of metallic), but MOST of what you're smelling is the chalk & mats on the floor and unfer the beams.
There's no way to change the chalk & mat smell (safety issues). It not like a workout (or gymboree type) gym where it's hard floors, 'slick' blue mats, and no chalk.... and adults with deodorant.
It's just the way that gymnastics smells. Like pools and chlorine, or hockey and corpses.