Nice detective work, as usual @dutchal !
A quick search for 'trainer' on RM yielded many interesting results. One of them:
https://rentmen.eu/Hhermess
You got to wonder why a talent like him would want to live in Davenport, IA. I hope he makes it out to NYC sometime.
I second what many have said about trainers at corporate gyms in NYC. I was a member at Equinox Amsterdam/76 for a while. It was quite obvious which ones of the trainers were available for additional services with both male and female clients. I guess that's where the money is made ...