Abhijit took me to the Signature Room for dinner on my birthday last year. Rarely has an evening been so well spent. They do the most sublime green apple martini ever concocted, and I have had a few of them before, believe me. We had Lobster bisque for starters, and it was simply a creamy dream in a bowl. Abhijit had got us a table near the window, and you can imagine how stunning the views from the 95th floor must have been. Chicago looked absolutely glorious. Expensive, but totally worth the food, the views, and the romance it creates. Great for big groups too.