Chic - Risqué (1979)
With this album Chic proved disco wasn't just about the dance floor, it could be funny, witty, serious and perfect for the album format, that had been the domain of rock music and jazz.
Musique - Keep On Jumpin' (1978)
An album that has big fun while it kicks like a mule. A track off the album was banned by many radio stations at the time for being too sexual. It seems some people don't like fun the Musique way.
Donna Summer - Bad Girls (1979)
Donna Summer with Giorgio Moroder released three double-LPs in eighteen months in the 70's and surprisingly they're all great. But I think this is the best. It's musically diverse - check out those rock guitars - and works conceptually. Plus this has plenty of killer tunes.