I usually tend toward boutique hotels, but I fell in love with the Hyatt Regency on the River several years ago, so now that's always where I stay. The first year, my mom had booked the weekend for my husband and I as a treat (I have family south of Chicago), that was also our first weekend away without our son. Well, my mum screwed up and booked the weekend PRIOR to what they'd thought. There was a pediatric nursing convention at the hotel at the time, and they were full up, and the whole durn CITY was full up (I forget what was going on, but our only other option was to turn around and drive 100 miles south). Long story short, the front desk person got us into a HALF a Presidential Suite for both nights for the same rate (the people booking the other half didn't need the entertaining area until monday, so they hadn't booked it). So we had over 1000 square feet of private concierge hotel room (with fold out couch that had an 18" deep mattress, shower and bath bigger than my bedroom, dining table for 20, 84" TV, etc.) all for our $99 a night rate. He'd booked the wrong date train tickets for his mother earlier that summer and was "paying it forward", because someone at AmTrack had gotten his mother onto that train in a private sleeper compartment. Hyatt won my perpetual business (and my husband's and father's and uncle's companies' business) because of that gentleman. LOL... hundreds of bookings from one kind act. Ever since, we've just always stayed in their basic rooms... but it doesn't matter, as they're fantastic. That LOVELY man saved the back of our laps on that one. Our entire stay that time, and each following has been some of the best we've ever had. And since I've spent half my life in hotel rooms, that says a lot.
It's also a pretty rockin' hotel.
http://www.chicagoregency.hyatt.com/hyatt/hotels/index.js...
Make sure to check out their deals and specials. I always hit up a lot of Blues in Chicago, but I also always get the tip from the concierge about where to go.
As far as food: Chophouse. Must. Absolutely must. There is NOTHING IN THE WORLD like cornfed beef, and the pigs in Illinois actually have wings. There are many many different chophouses in Chicago. I'm afraid I can't say which is best. I've had Harry Met Sally meals in every one I've been to.