most utopian scenes i had ever encountered in music. >> mancuso is one of the guys who took the art form of playing the record and how he curated the records. he might play a salsa record. it wasn't so much about a style as it was an aesthetic of dancing. >> all kinds of people here, people who dance, people who hop up and down. you can get high, 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. with four on the floor.