The Apartment
The Apartment is a 1960 American romantic comedy-drama film directed and produced by Billy Wilder from a screenplay he co-wrote with I. A. L. Diamond. It stars Jack Lemmon, Shirley MacLaine, and Fred MacMurray, with Ray Walston and Edie Adams in supporting roles.
Plot
C.C. "Bud" Baxter is a lonely minor office worker at a large insurance company in New York City. To climb the corporate ladder, he allows four company managers to take turns borrowing his Upper West Side apartment for their extramarital affairs. Baxter meticulously juggles the "booking" schedule; a steady stream of women and liquor bottles convince his neighbors that he is a playboy.