Television: The Parlor Pinkertons

"How long can the quiz shows last?" gloomed Master of Ceremonies Jack (Twenty-One) Barry one day last week, in the midst of staging an unemployment insurance debut as a song-and-dance man at Atlantic City's half-packed 500 Club. Plump and 40, Barry danced stiffly, told gags, talked his way through songs, though he is no Rex Harrison, and made a brief pass at a piano. Actually, Barry need not worry about his future in TV's quiz world. This summer the major networks have unleashed no fewer than ten quiz giveaway shows to fight their way...