Book excerpt: Short Plays / Comedy / 2m, 3f / 3 ints. This long-running Off Broadway hit features the work of three gifted playwrights. David Mamet's AN INTERVIEW is an oblique, mystifying interrogation. A sleazy lawyer is forced to answer difficult questions and to admit the truth about his life and career. The why and where of the interrogation provide a surprise ending to this brilliant twenty minute comedy. In HOTLINE by Elaine May, a neurotic woman with enough urban angst to fill a neighborhood calls a