The Ivy deals are real and they are spectacular, but you really have to hunt.  Found Nov 18 - 20 in Nov.

Having stayed at The Great Eastern (really a shame to lose that historic name in favor of some inane, made-up, pseudo-Latin name) I can tell you why the rates are so much lower on the weekends: The City, where Andaz is located, is a ghost town.

All of the restaurants in the hotel (including the Pub) are closed on the weekend, with exception of the casual place where your included breakfast is served. Other than the McDonald's outside Liverpool Street Station, and the M&S Simply Food inside, there's no place to get something to eat or drink on Saturdays and Sundays.  Spend a Friday at the hotel and you'll see just how isolated and lonely it is in London's business and financial district when the markets are closed.

great info.

Hmm.  Wonder if Andaz will keep the "closed on weekends" tradition going at the in=house restaurants and pubs.