So Funny I Forgot to Laugh (aka Stop It, You're Killing Me)

Plot:

An old female friend of Martin's, Bonnie, returns to New York City from Cleveland to pursue a stand-up career. Bonnie's first performance as a stand-up bombs. Martin tries to encourage her by suggesting that she should use her past relationships in her act (which has more humor in it than her current act). Martin and Bonnie start to fall for each other and end up sleeping together. The whole gang shows up for Bonnie's second performance as a stand-up comic. Bonnie, following Martin's advice, discusses her relationships in her act. Unfortunately for Martin, Bonnie sticks to talking about her current relationship. The gang, and the audience, except for Martin, love the new act. Afterwards, the gang offer Bonnie funny stories about Martin. Alone together back at Martin's apartment, Martin almost starts to tell Bonnie about his reactions to her new act. A phone call interrupts. An HBO scout was in the audience and loved the act. Next Friday, Bonnie is informed, an HBO big-wig wil