For those unfamiliar, Chicago is also one of those American cities with its own style hotdog, so it's something of the local culture:

> All-beef frankfurter, on a steamed poppy seed bun, topped with yellow mustard, chopped white onions, bright green sweet pickle relish, a dill pickle spear, tomato slices, and a dash of celery salt.

From https://en.wikipedia.org/wiki/Chicago-style_hot_dog

Obviously, this is only as serious as you take hot dogs, but they are very good and compared to deep-dish pizza, the Chicago-style hot dog feels almost healthy.

That said, there are exceptions (my sister is dead to me though...)