Kids love Portillo’s for its hot dogs and burgers. Parents love the chain, which originated locally, for the broad and inexpensive menu that goes above and beyond meat-on-a-bun options, including salads and relatively healthy sandwiches. Then again, when in Chicago, consider throwing caution to the wind and double down with a combo beef and chargrilled sausage, which is, as it sounds, an Italian sausage buried in Italian beef on a bun. Before you leave, order a slice of the famous chocolate cake, and as you lick your lips and savor its rich, moist goodness, consider its not-so-secret ingredient: mayonnaise. Reliably loud and frenetic, you won’t feel out of place here if you bring along your noisy brood.