Since 1937.   Longest continually run jazz club in NYC.  No cover charge.  Jazz: 7 p.m. - 9 p.m. Tuesday through Saturday. Pay close attention to Eri Yamamoto's trio burning up the cozy stage on Thursdays, Fridays and Saturdays.  Dixieland jazz: 8 p.m. - 11 p.m. on Sundays and Mondays. Blues and R&B from 9 p.m. - 3 a.m. from Tuesday through Saturday; and 11 p.m. - 3 a.m. on Sunday and Monday.   The Creole Cooking Jazz Band, Grove Street Stompers and Sweet Georgia Brown have been playing here weekly forever, and for good reason: they rock the house.