In 1944, producer Norman Granz organized a concert billed as "Jazz at the Philharmonic" (also JATP) as a fundraiser in Los Angeles. The event, which was recorded, featured Illinois Jacquet, Jack McVea, J.J. Johnson, Shorty Sherock, and a rhythm section with Nat King Cole and Les Paul; Jacquet's playing in particular caused a bit of a sensation. After a few more similar events, Granz in 1946 began organizing extensive annual tours using classic swing and bop musicians in a jam-session setting. Although some critics often complained that these events encouraged grandstanding (R&...