Depends on which doubletree... The ORD Doubletree Club in Des Plains (Up near target and the Allstate arena) kinda sucks, but a hotel is a hotel. Not much around it, and a good number of crewmembers (at least used to be back in the days that I stayed there). There's Target, Steak and Shake, Chilis, Krispy Kreme and Chipotle nearby. That's about it.
Can't remember the name of the place, but there used to be a hotel a bit further out that had crewmember discounts for around $40/night. Want to say it was a Radisson, Ramada, or Hampton Inn.