Accouplements Pour Voyeurs (1980)
A call-girl named Gina (Christine Lodes) decides to open up a special type of “spa” with one of her clients Francois (Ceray). Francois recruits two comely ladies Sylvie (Lucie Doll) and Sabine (Morgane).
The gimmick is that clients in action can see other clients while they themselves are being attended to. This causes a problem when a female client, Serena, sees her husband (Pontello) in the next room. The problem is resolved with an orgy.
Actress: Christine Lodes, Lucie Doll, Gabriel Pontello