In a distant past, I was a manager at a good name brand hotel in Los Angeles area.
We had a swingers club meet in our ballroom every last saturday of the month.
The ballroom was far in the back of the hotel, and the only entry in was via front doors - and service entrance via kitchen...
The group blocked off the entire hallway to the ballroom, and posted a guy in the lobby and a guy near kitchen service entrance (in a car) as look outs. If anyone suspected LE... they would radio in, and some guy, stationed at the light switch, would flash the lights, and everything turned legit in a flash.
Never had a bust, but it was always fun serving hors-d'oeuvres to some ladies 69 on a table...
"Pig in a blanket anyone?"
I bet Kinkyorca would have jumped on the Tuna bites...