Jump Blues

Jump blues is an up-tempo blues usually played by small groups and featuring horns. Jump blues was very popular in the 1940s and was called rock n roll in the 1950s.

Jump accomplishes with three horns and a rhythm section what a big band does with an ensemble of sixteen. The tenor saxophone is the most prominent instrument in jump. Jump groups, employed to play for jitterbugs at a much lower cost than big bands, became very popular with agents and ballroom owners. Saxophonist Art Chaney said "[w]e were insulted" when an audience wouldn't dance.

Fuente: http://en.wikipedia.org/wiki/Jump_blues