Au Cheval (late night) ★ 4.6
Au Cheval in Chicago is the West Loop diner-bar on Randolph that runs the full menu until 02:00 nightly, with the country-famous single-with-egg cheeseburger.
Try: Single cheeseburger with egg
Tip: Sit at the bar past midnight; the queue clears at 23:30 and the kitchen runs the same menu without the dinner wait.