It’s now one of the most anticipated events of “Summertime Chi,” but it started as a small outdoor get-together with a little music, for family and friends.

Terry Hunter and Mike Dunn are two of the “Chosen Few DJs,” known around the world for bringing innovative, feel-good music to millions of house fans.

Coined in 1977 by DJ and producer Wayne Williams, “The Chosen Few Disco Corporation” originally included friends and South Side DJs Jessie Saunders, Alan King and brothers Tony and Andre Hatchett. In fact, it was a Hatchett family Fourth of July picnic behind the Museum of Science and Industry, where the festival first took shape.

Hunter said the whole thing caught everyone by surprise.