One night near O'Hare
Gene & Jude's is probably your best bet for dogs, but only counter or take out since it's open late. Paradise Pup is great for burgers, dogs & chicken, but they close at 5pm. Also nearby is Bob-O's (not sure of their hours), which has decent burgers but good dogs and very good Italian beef and really good skin on fries. A little farther away is Superdawg which is great for dogs and fries and offers drive-in service.