i thought that was one of the 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. he might play a salsa record. it wasn't so much about a style as it was an aesthetic of dancing. >> you have all kinds of people here. you have people who are dancing. you can hop up and down. 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