Chicago, River North, Part 2

In our last post, we left you at the Green Door Tavern in Chicago's River North neighborhood. Normally, in an Around America multi-post, we take you to three different bars in a city. But this time, we never left the Green Door. You see, the Green Door has a little secret. In the basement, there's a nondescript door with a rack of little knickknacks.  Behind that door, is an authentic speakeasy known as The Drifter.