<P> Typical big band arrangements are written in strophic form with the same phrase and chord structure repeated several times . Each iteration, or chorus, commonly follows twelve bar blues form or thirty - two - bar (AABA) song form . The first chorus of an arrangement introduces the melody and is followed by choruses of development . This development may take the form of improvised solos, written soli sections, and "shout choruses". </P> <P> An arrangement's first chorus is sometimes preceded by an introduction, which may be as short as a few measures or may extend to chorus of its own . Many arrangements contain an interlude, often similar in content to the introduction, inserted between some or all choruses . Other methods of embellishing the form include modulations and cadential extensions . </P> <P> Some big ensembles, like King Oliver's, played music that was half - arranged, half - improvised, often relying on head arrangements . A head arrangement is a piece of music that is formed by band members during rehearsal . They experiment, then memorize the way they are going to perform the piece, without writing it on sheet music . During the 1930s, Count Basie's band often used head arrangements, as Basie said, "we just sort of start it off and the others fall in ." </P> <P> Before 1914, social dance in America was dominated by steps such as the waltz and polka . As jazz migrated from its New Orleans origin to Chicago and New York City, energetic, suggestive dances traveled with it . During the next decades, ballrooms filled with people doing the jitterbug and Lindy Hop . The dance duo Vernon and Irene Castle popularized the foxtrot while accompanied by the orchestra of James Reese Europe . </P>

Of the following which new york band was significant during the early period of the big band