I live in the suburbs of Chicago and most of the things you’d like to do in Chicago are very easy to do on your own. The Art Institute is right on Michigan Ave and on Thursdays it is open until 8:00 pm. If you become a member you can get in an hour before everyone else…that may be less money than what you’d pay for a shore excursion. You can also take an Architectural Boat Tour on your own…you board just off of Michigan Avenue. The Goodman Theatre is in the Loop on Dearborn Street, 2 blocks west of Michigan Avenue. During July “ Tommy” the musical is playing there and they have matinees on Wednesdays and Saturdays. The Chicago Theatre is on State Street, 1 block west of Michigan Ave and I am not sure what their shows are, Wrigley Field is a must see and you can take an Uber, cab or jumper on the Red Line train to get there. Depending on when you are here, check Stub Hub for tickets or you might get lucky at the Box Office or on the website. There are lots of good bars and restaurants in the Wrigleyville area. Chicagoans are very friendly and will point you in the right direction. Have a great trip and wander around Chicago. The concierge at your hotel should be able to answer more questions. Have a great time!