< Garçonnières très spéciales

• ...denn sie wußte nicht, was sie tat... Tabu DVD title - Tabu have mixed up two films in their DVD releases - this is the original German title of Caresses inavouables
• French Erotica
• Le Pied à terre the original working title and now the (much shortened) Blue One DVD with Les Bons coups and Les Femmes des autres
• The Pied à terre Alpha France English title
• Two-Way Mirror USA, Cal Vista / VCX DVD

• Cathy Dupré as Jennifer, plays a lesbian
• Dany [3] plays a woman with Jean-Loup
• Elisabeth Buré plays Françoise
• Eva Muller plays the brunette pick-up by Jean-Loup
• Isabelle Brell as Isabelle Bresl, plays a lesbian
• Laura May plays the blonde pick-up by Jean-Loup
• Marianne Aubert plays Marie-Claude
• Olivia Flores as Moannie, plays Valerie, the neighbour

Males -

• Hubert Géral, plays Jean-Loup, Elisabeth Buré's husband
• Guy Royer, uncredited, plays plays Jean-Claude, Marie-claude's husband
• Richard Lemieuvre, uncredited, plays Vincent
• Pjotr Stanislas, uncredited, plays Mathias
• André Kay, uncredited, plays the insurance man
• Patrick Perrin

Francoise (Elisabeth Buré) has a husband Jean-Loup (Hubert Géral) who isn't very intererested in her. But her friend, Marie-Claude (Marianne Aubert), and her husband, Jean-Claude (Guy Royer), enjoy using an apartment with a two-way mirror into the bedroom of the adjoining apartment. There they can have sex and watch other couples and threesomes have sex at the same time.

Marie-Claude synmpathises with her friend's plight and gives her the key to the apartment. Françoise is reluctant to make full use of the 'facilities' at first, but eventually succumbs to the temptation of using it with an insurance man (André Kay), a female neighbour Valerie (Olivia Flores) and Vincent, a long-time frequenter of the apartments (Richard Lemieuvre). While she is with the last, she sees her husband going at it with Cathy Dupré next door. She ends up having a threesome with Vincent and Mathias (Pjotr Stanislas) while her husband has two girls (Eva Muller and Laura May) on the other side of the mirror. She has much better sex with her husband as a result.

This film explores a similar theme and seems to have been shot at the same time, by the same director and with an overlapping cast as Couple "libéré" cherche compagne "libérée".