I'm visiting Chicago in a few days and I'm going to meet up with a friend who has a birthday coming up. I want to take her to a nicer restaurant, but something not too stuffy (as in super high end). Cool decor and great food are pluses. Also, neither of us eat any gluten (not celiac, just by choice) and tend to shy away from most diary, so any restaurant suggestions accommodating this would be nice. Somewhere within driving distance (20 minute taxi maximum) of the Sheraton Hotel and Tower (301 E North Water St) would be greatly appreciated. Thank you!!!