Just Lovely
In a great location—the theatre district on the loop—Hotel Allegro is central to most things a tourist would want to see. We did a lot of walking but in just over the day we stayed there we managed to do Millenium and Grant Park, the Navy Pier and the Aquarium. Also near by were several museums.
Like all Kimpton locations I've experienced, the interior design is lovely and well thought out—an eclectic mix of modern and vintage, in the case of the Allegro. During our stay they offered many thoughtful amenities, and a free local beer/wine/sangria reception every evening & delicious coffee/tea mornings in the main lobby.
Our experience was further augmented by comfortable accommodations (dare I say, luxurious in some instances?) and some of the most pleasant/helpful staff I've experienced in a hotel. I would not hesitate to recommend the Hotel Allegro to anyone staying in Chicago. 
Oh, and apparently they also allow pets! I spied several dogs.