Hey Chicagoans! How do you stay so skinny?

I’ve been in Chicago for 3 days now and between the pizza and the beef sandwiches and the hotdogs, I’m on track to put on a few. That’s not even counting the amazing sushi, Cuban food, and Chinese food.

But I’m noticing that people here are pretty skinny on average. So my question is, how do you stay so svelte (compared to the rest of the US)? Do you only eat out once a month? Is the junk food only for tourists? Is there a fitness culture?