Swing refers to a style of jazz music that originated in the United States between the 1920s and 1930s. New styles of music developed from the former Dixieland jazz and Chicago jazz are finally popular for their danceability and full sound. In the swing era, entertainment and art are closest, jazz compromises to achieve popularity, but still retains its characteristics. The spread of swing is inextricably linked to the rise of big bands, often referred to as jazz bands, which shows the size of the lineup. In the past, instrumentation ranging from trio to octet was the norm, but now big bands are definitely a novelty. Their scale has changed the way they make music, but it has also opened up a host of new musical possibilities.