Chicago: The Weiner's Circle
If you're not too intimidated to order at this legendary hot doggery (beware the "chocolate milk shake"), the move is a double char dog with everything. A Vienna Beef hot dog on a poppy seed bun is "dragged through the garden," that is with mustard, raw onions, neon-green relish, pickle spear, tomato slices and celery salt. Essentially, this is the traditional Chicago hot dog with one exception.
The departure from the purist version? The Weiner's Circle char-grills its dogs rather than steaming them. A double char is simply two blackened dogs underneath all those veggies on one bun. It might not convert you from the original Nathan's of Coney Island mustard and sauerkraut, but it's arguably the best place to sample a true Chicago dog. Just don't even think of asking for ketchup.