"DA SHOW MUST GO ON":  Ken Dashow, weekend disk jockey at WNEW-FM and a member of the New York Tawk improv group, has devised and directed this show, consisting of two one-act comedies featuring Victoria Barone, Lee Leonard, Neal King, Jim B. Gardiner, Anita Whitney and Bonnie Comley.  Monday at 8 p.m. at the Triad, 158 W. 72nd St., (212) 799-4599.

--- Chip Deffaa