Dixieland

Dixieland music, sometimes referred to as Hot jazz or New Orleans jazz, is a style of jazz which developed in New Orleans at the start of the 20th century, and was spread to Chicago and New York City by New Orleans bands in the 1910s. Dixieland jazz combined brass band marches, French Quadrilles, ragtime and blues with collective, polyphonic improvisation by trumpet (or cornet), trombone, and clarinet over a "rhythm section" of piano, guitar, banjo, drums, and a double bass or tuba.

Well-known jazz standard songs from the Dixieland era, such as "Basin Street Blues" and "When the Saints Go Marching In", are known even to non-jazz fans.

Source : http://en.wikipedia.org/wiki/Dixieland