In August 1939, LIFE magazine sent photographer Charles Peterson to shoot an assignment which was never featured in the magazine. This invitation only jam session was organized by jazz guitarist Eddie Condon and promoter Ernie Anderson.

It took place in New York at the Riverside Drive apartment of cartoonist Burris Jenkins. The guest list included Sister Rosetta Tharpe, Duke Ellington, Cab Calloway, Ivie Anderson, Hot Lips Page, Billie Holiday, Harry Lim, Pee Wee Russell, Johnny Hodges, Chu Berry, Cozy Cole, Clyde Newcombe, Bud Freeman, and Dave Tough.