Chorus Call (1978)

Cheryl Cooper is a dancer who wants a part, but is held back by the vindictive Bertha, a former partner. So Cheryl resorts to seducing Sidney, the director. Meanwhile, the sleazy producer Ed has sexual encounters with every woman he meets, while Manny, the financial backer, clashes off against Rue, an egoistical local talent agent who is trying to cast the popular Mona Randall for the lead in the play, while Mona has a meeting of minds and bodies with Manny's business partner, Frank, to ensure that she land the lead.