Entitled All New: A Pre-Broadway Comedy Workout, Mason will perform at the plush nightspot through Nov. 18. His new show, featuring a "potent mix of political satire and insightful observations, will debut at Feinstein's before moving to the Great White Way," according to press notes. Show times are Tuesday-Saturday evenings at 8:30 PM with late shows Friday and Saturday nights at 11 PM.

Jackie Mason has been seen on Broadway in Jackie Mason: Freshly Squeezed, Jackie Mason's Laughing Room Only, Prune Danish, Much Ado About Everything, Love Thy Neighbor, Jackie Mason: Politically Incorrect, Jackie Mason: Brand New, Jackie Mason's The World According to Me! and A Teaspoon Every Four Hours. He won a 1987 Special Tony Award for The World According to Me!

Feinstein's at the Regency is located in Manhattan at 540 Park Avenue at 61st Street. All shows have a $60 cover and a $40 food-drink minimum. For reservations call (212) 399-4095 or visit www.feinsteinsattheregency.com.