A couple years ago, CAX had a good deal with the Hilton, which we found comfier--but the Crowne Plaza is fine, and you can't beat the convenience of walking out the back of the hall and practically being there already. I don't recall the hotel having a pool (it's pretty small) and its website doesn't list one.
Food-wise, fiance and are big fans of Pizza Chicago, which is about a block away. (If you go out the front of the hall, across the street, and through the courtyard on that block, it's right in front of you.) Try the John Dillinger, assuming nobody has any conflicting allergies. We also liked a Japanese restaurant called Rokko which is over in the direction of the art museum.