The ops question was % of men that have gone to FS AMP. Since he is asking about FS AMPs, I would say not as many as you might think. If the question were how many have gone to an AMP of any kind, I would the % is probably more than you think.
What I would be interested in is a breakdown by age, occupation, what type of AMP, and how often.
I think a lot of guys go to “legit” and work their way up. Some who only frequent legit may have stumbled into a FS or HE spa and discovered a whole new world from which there is no turning back.