I'm spending new years near Chicago on a retreat. My only transportation back into Chicago is the day the retreat ends, but my flight home is the next morning. Rather waste money and time on a hotel and leave without ever actually seeing Chicago, my plan was to find someplace to keep my suitcase (if possible) and spend most of the evening/night seeing what Chicago has to offer.
What's there to do/see on a Sunday evening? I'm over 21, so no restrictions there. What areas should I stay away from?
Also, does anybody who travels frequently know what I might be able to do with my luggage since O'hare apparently has no lockers anymore? Do airlines let you check it early?