This is a super interesting anecdote. I notice, too, that it'd been years between the last post and yours, which surprised me, given this topic, which I thought would have been popular.
So ridiculous, what you describe. He actually went to the manager and claimed you were "stalking" him?? Unbelievable.
Also, I have always wondered what it's like for the male employee to have to "observe" and then speak with you, tho' he sounded very professional. THAT has to be awkward. I'm sure such complaints are common enough in gyms/health clubs. (I mean, my suburban health club had a lot of serious "activity" in the sauna: circle jerks, blowjobs. no joke!) and I don't know if anyone ever complained.
At least the guy talked to you about what he was feeling.
Did he have a response? I'd be interested to know.
As anyone on this site would say, the towel dance is utterly ridiculous.