TBH it sounded more like a swinger situation, the catch was they were using the station's gym for orgies and doing it on duty time rather than strictly off duty. I also don't know if they had a policy for fraternizing with coworkers in place, but if they did, their own sergeant was hosting drunken parties on his houseboat apparently. So I doubt it was being enforced.
Also, at least a couple spouses weren't in on the whole thing, so it was technically cheating with at least half of them.