Chicago’s secret is very much out in the open now: house music DJs headline clubs and festivals from London to Cape Town. But this electronic dance music was born behind closed doors at underground venues. In the early 1980s, a band of mostly Black, gay artists created house music in old warehouses. Led by such DJs as Frankie Knuckles, a group of artists created a mechanical, bass-heavy sound using drum machines and synthesizers. It became the soundtrack of safe spaces that were free from the racism and homophobia of the outside world.