"It's the most creative jazz jam in town," says a customer, Sabreen Williams, who has been coming for three years, and who, from time to time, gets up to sing.

Feb. 4 at 4 p.m. Latin jazz jam.

In January 2009, the jazz jams were scheduled for the first and third Friday each month with Billy Denk as host.

E Map This small bar tucked in the eaves above Marco Polo restaurant holds Wednesday-night jazz jams.

Open jazz jams are scheduled on Wednesdays at 9 p.m., although James Keepnews, an electric guitar player, explained the reality this way: "Well, maybe not exactly at 9.

Other weekly programs include belly-dancing, jazz jams, a musical revue and soon a late-night vaudeville show that Joaquin Torres-Pereyta, the theater's director, describes as spicy.

Admission to the jazz jam is $4 plus museum admission: $5; $2.50 for the elderly; free for children under age 1.

Live music (jazz jams and acoustic grunge) is sometimes played here.

Monday night's jazz jams at St. Nick's Pub, at St. Nicholas Avenue and 149th Street, have become some of the most popular in the city.