swing band
搖擺樂團(搖擺音樂是爵士音樂的一種)

explanation: Refers to a band that plays a certain style of jazz, very popular in the 1930s and 40s.  A very famous song by Duke Ellington was titled "It Doesn't Mean A Thing, If It ain't Got That Swing". It refers to the "swinging" musical style of these jazz bands.