Hot Chocolate - Every I's a Winner = Disco Music Video Live Kultnacht 1978 (78007)

Every 1's A Winner and everything about this song is perfect. Hot Chocolate never gets old (watch Guardians of the Galaxy). Towards the end of the song, you hear the famous Doreen and Irene Chanter belting SATISFY.
 
Indeed, what is a song worth without good backing vocals. And Errol was such a cool guy!
 
Is this disco song exemplary for the late 70's or do you have another song?