If it's Friday, it's Cotton Club night at this dive. The joint starts jumping around midnight. A little while later, depending on the number of shouts and stomps, the cozy club is leaping and rolling with the sounds of some of Miami's most accomplished jazz players. Jesse Jones, Jr. -- Liberty City's maestro of bop -- and his combo are the usual anchors, with occasional sets from featured singers. On the barstools old men dance funk to the heated jam sessions. At the tables local musicians and artists swing to the rhythms. If you are aching to taste what jazz might have been like during the Harlem Renaissance, this funky little speakeasy will cook it up. The club is testament to aficionados that bebop and blues are not confined to chrome interiors where the well-heeled listen motionless to the sermon of jazz. The Cotton Club serves its music with homey grit, friendly faces, and a free buffet.