So, I'm in Chicago this summer. It's an interesting story of how that came to pass, but I don't want to tell it. Anyway, I've been compiling a list/calendar of things to do in the city for the summer. They're basically all free or nearly so-- for example, I'm not averse to listing concerts that aren't free but college students get in for free. (For example, college students get free admission to all CSO concerts at Ravinnia.)
Here is what I have so far, and if you want to add events to the list or join the facebook group if you'll be in the city for the summer, then let me know somehow.
This is the best city to be in for the summer, and if you're here, you're lucky.