The transition from the late-1970s disco styles to the early-1980s dance styles was marked primarily by the change from complex arrangements performed by large ensembles of studio session musicians (including a horn section and an orchestral string section), to a leaner sound, in which one or two singers would perform to the accompaniment of synthesizer keyboards and drum machines.
Disco dance
Disco is a genre of dance music that that had its roots in clubs that catered to African American, psychedelic and other communities in New York City and Philadelphia during the late 1960s and early 1970s. While disco was a form of black commercial pop music and a craze among black gay men especially, it did not catch mainstream attention until it was picked up by the predominantly white gay clubs of New York. Latinos and women embraced disco as well, and the music eventually expanded to several other popular groups of the time/