What does Boxing Day have to do with boxing?
any dance to jazz accompaniments, composed of a profusion of forms. Jazz dance paralleled the birth and spread of jazz itself from roots in black American society and was popularized in ballrooms by the big bands of the swing era (1930s and '40s). It radically altered the style of American and European stage and social dance in the 20th century. The term is sometimes used more narrowly to describe (1) popular stage dance (except tap dance) and (2) jazz-derived or jazz-influenced forms of modern dance. It excludes social dances lacking jazz accompaniment-e.g., the rumba and other Latin-American dances.