Unless you're planning to stay at several Doubletree properties, you might have better luck in the individual hotel thread for any specific queries.

But, as mentioned, since Doubletree charges non-elites for breakfast, the quality is much higher than the free giveaway breakfasts you get at a Hampton. Of course, sometimes one gets carried away with the full English buffet and eats a few too many sausages, etc. and then feels like crap for a couple of hours...