most utopian scenes i had ever encountered in music. >> mancuso is one of the guys who took the art form of playing the records and how he curated the records. he may play isaac hayes' record. it wasn't so much about a style as it was an an aesthetic of dancing. >> you have all kinds of people here. you have people who are dancing. you can get high. you can stay here all night. >> why are people dancing again? i wish i knew. but i'm glad it's happening. ♪ >> what we now know as disco really starts with a band called the tramps. the drummer, earl young, invents the idea of four on the floor with eight in the high hat. so everything is, bum, bum, bum. ♪ burn baby burn >> that's the sound of disco.