Beneath one of Chicago’s most iconic jazz clubs lies a hidden piece of mob history. The Green Mill, located at 4802 North Broadway in Uptown, has been operating since 1907—but during Prohibition, it became a hotspot for organized crime. The Green Mill wasn’t just a bar—it was a strategic hideout for Al Capone. With a dedicated booth facing both entrances, Capone ensured he always had a clear escape route. And when danger came, he didn’t flee through the front—he disappeared into a network of und