Twenty-seven years on Broadway (and off) in an ""honorable"" profession: press agentry. Sabinson's opening remarks will have a lot of buffs heading for the doors as he cries, ""A press agent can make a star out of a nobody"" (his nobodies are Carol Channing, Gwen Verdon, and Julie Andrews) and, only half-jokingly, ""I did, do you hear! Me!"" Once the delusions of grandeur have abated, however, his mezzocute, mezzo-intelligent accounts of Earl-Wilsonizing, billing-juggling (Ann Sothern vs. Bob Cummings), critic-coddling, star-sitting (Lucille Ball: ""Harvey, please come fetch me. . .""), and slogan-coining (""PATTY DUKE SPEAKS"") prove reasonably juicy slices off the ham and other Stage Delicatessen specialties. ""Some of the names have been changed to protect the crazed,"" but there are names aplenty--Carol Burnett, Grace Kelly, Albert Finney--flops aplenty (Breakfast at Tiffany's, ""David Merrick's Bay of Pigs""), and plenty of neon neurosis to satisfy the East Coast stage-door Johnhies and Joans.