Accouplements Pour Voyeurs (1980) Jean-Claude Roy

Accouplements pour voyeurs (1980)
 aka Peep Show Girls
Aspect ratio: 1.66:1 | Length: 59mn
Dvdrip Xvid Avi - 688x448 - 1.22gb
http://www.imdb.com/title/tt0388681/

Starring:
Christine Lodes as Virginie, plays Gina
Lucie Doll plays Sylvie
Morgane plays Sabine
Serena plays a customer, the wife of Gabriel Pontello
Alban Ceray, as Alban, plays Francois
Richard Lemieuvre as Richard Allan, plays a customer
Dominique Aveline plays a customer
Gabriel Pontello plays a customer, the husband of Serena

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)... (From a review originally published in La Saison Cinematographique, translated by x_axis47, with a correction.)

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.