Interiors of the hotel scenes were shot in Los Angeles at the Ambassador Hotel on Wilshire Boulevard.
Scenes set in Mexico were actually were filmed in San Diego, California.
The film's main movie poster featured the two couples standing inside a children's playpen with the film's title attached to it with each of its letters being formed from a child's play block. The tagline read: "Why do they call it "adultery," when it makes them act like children?"
The period of principal photography on this picture was scheduled to run around ten weeks according to the 4th July 1979 edition of show-business trade paper 'Daily Variety'.
According to film critic'Janet Maslin' in her review of the film published in the 24th October 1980 edition of 'The New York Times', the hotel in the movie was the same hotel "as played by the hotel that's the main location for 'The Stunt Man (1980)". This location is the Hotel del Coronado, which is situated at 1500 Orange Avenue in Coronado, California, USA. The venue also famously featured in the classic Billy Wilder film Some Like It Hot (1959). Both The Stunt Man (1980) and Loving Couples (1980) both debuted in cinemas in the same year of 1980. However, as interiors of the hotel scenes were shot in Los Angeles at the Ambassador Hotel on Wilshire Boulevard, only exteriors of the Hotel del Coronado were featured in Loving Couples (1980).