Since walking is limited and you're staying in the River north area, I did a yelp search to give you an idea of places within a mile of the hotel as a start.

http://www.yelp.com/search?find_desc...o::River_North

Chicago's really a walking city, so I would suggest getting a 3 day CTA pass to help get around instead. Other option would be to cab it from place to place.

http://www.transitchicago.com/travel...ridecards.aspx