The setting is the Royal Gardens Cafe. It's dark, smoky. The smell of gin permeates the room. People are leaning over the balcony, their drinks spilling on the customers below. On stage, King Oliver and Louis Armstrong roll on and on, piling up choruses, the rhythm section building the beat until tables, chairs, walls, people, move with the rhythm. The time is the 1920s. The place is South Side Chicago, a town of dance halls and cabarets, Prohibition and segregation, a town where jazz would flourish into the musical statement of an era.