At left, gossip columnists Liz Smith and Claudia Cohen. At right, musical theatre stars Debra Monk and Nathan Lane. Minnelli On Minnelli is a celebration of tunes linked to her film-director father, the late Vincente Minnelli. The song-and-dance revue, with Minnelli backed up a six-man chorus, is scheduled for 24 performances at the Palace Theatre and runs to Jan. 2, 2000.