If My Mother... Only Knew (1985)

Hope Russell and her divorced mother, Dianne, live together and both have guy troubles. Dianne can't get over her ex, Roger, and Hope's boyfriend, Robby, is constantly at work and never has time to spend with her. When Robby blows her off yet again, Hope goes to a concert with possibly lesbian friend, Lynanne, leaving her mother home alone when Robby finally does drop by. Robby convinces Dianne to accompany him to a night club, which leads to a realignment of relationships.