Question: What 1968 drama film featured an actress who was also a nightclub entertainer, a singer, and one of the early "Playboy" Playmates?
Sentence (from "Single Room Furnished"): The film is based on the stage play of the same title by Gerald Sanford, adapted by Matt Cimber, who also directed (credited on-screen as "Matteo Ottaviano").
Relevant evidence: No