The Terrace Room is located in the lobby of the Omni William Penn Hotel. It is "An award-winning restaurant serving "New Traditional" cuisine with original and creative dishes inspired by Executive Chef Jacky Francois. " This is a very upscale area. The restaurant itself (being connected to the hotel) is very aristocratic except that there is a huge palm tree in the middle of the room. There is a full bar and there is an extension of the restaurant into the hotel lobby where you can stalk passerbys.
The service was top notch as expected from a restaurant such as this. My waiter was always ready to serve and very friendly (although this was at 8pm Wednesday when the weather outside was something like 0 degrees F).
The food presentation was artsy fartsy. I rather have the food taste good than look good. But the food tasted great. The New York Strip I ordered was one of the juiciest I had cut in awhile. The menu that night was rather limited.
Be prepared to pay a good amount if you want to be full.