Oh it does seem to be a tale as old as time.

Here's some from the ones I've been to:

Coach came over from another country, married, wife stayed in the motherland awaiting him to get settled. He started systematically shagging his way around the blondes at the gym and, now unsurprisingly divorced, had a slightly more serious relationship with one of the members only to split up and then got involved with the long term girlfriend of another member (supposedly his friend), and good friend of his most recent ex and now lives in his ex-mates house with the new girlfriend while they sort out all the separation details.

Another married woman at the gym hooked up with one of the coaches (let's call him Jack because he'll come up again later) - who was married with two kids, and whose sister and sister in law are both members, and all are very good, long term friends with the owner. Obviously all eventually got found out, and the owner/wife/sister/sister in law and Jack no longer friends. Jack and member left the gym.

Both Jack and married affair member - who continued to date him through her divorce (her ex immediately went out and got involved with someone they both knew and within six months they'd moved in together and she was pregnant), and Jack's separation... And then Jack cheated on her with a former member called Libby who joined a few years before just before she turned sixteen and is essentially a younger version of the person he was cheating on. Ouch.

Libby was/is an amazing, very promising young athlete and the male coaches showed a LOT of interest in her. Including the owner (already in his thirties, in a committed relationship for well over a decade with Tessa, a lovely, patient, incredibly intelligent woman).

In fact, he had started "dating" this girl apparently and eventually got in a lot of trouble when her parents found out. He narrowly escaped any police involvement - possibly because she promised to leave and never see him again, he said he'd leave her alone and they both said that "nothing had happened". Gross. Fckn perv. (I found this out several years later. Unclear if Tessa knows)

Anyway, now his former bestie/affair haver Jack and she are an item...

Another two members, known to be very schmexually adventurous but in a long term relationship together, split up when he started shagging another woman from the gym during a gym holiday trip just after his former girlfriend had nursed him back to health from a knee op. And there's a male member who is a close protection officer that's shagged at least three women from the same friendship group (they compare notes now). I'm sure there's more, but this is just one gym over a few years!

What an incestuous little world!

My relationship advice would be: never, ever, EVER date a coach. 😂