dance band vs jazz band

dance band and jazz band both are nouns.

Word	Noun	Adjective	Verb	Adverb
dance band	Yes	No	No	No
jazz band	Yes	No	No	No

As nouns, jazz band is a hyponym of dance band; that is, jazz band is a word with a more specific, narrower meaning than dance band:

Other hyponyms of dance band include big band, combo, jazz group, rock band, rock group, steel band.

dance band (noun)	jazz band (noun)
a group of musicians playing popular music for dancing	a small band of jazz musicians