It's an understatement to say that staying at 21c is like staying in a modern art museum. It IS staying in a modern art modem. Every nook and cranny offers a fresh -- and often avant garde -- display. The rooms are spacious with great amenities, including in-room automated espresso machines, and the Proof restaurant is fabulous. The Saturday night liveliness of the lobby had us worried when we arrived, as the lobby was definitely a raucous environment, but the rooms turned out to be a peaceful oasis far from the commotion. Highly recommended.