From the perspective of having spent 30 years selecting and contracting with hotels for state, regional and national associations, nzed's given you more than most need to know in a concise package.
He did leave out the part where a few key staffers go up on the roof, sacrifice a live chicken, marking their foreheads with the blood, and taking auguries from its still quivering entrails to determine the rate to be offered to the current group RFP on the sales desk.