This Seattle Times report indicates that hotel occupancy was down to 77% for January and February this year as compared to 84% for the same period in 2006.  To help offset this slow down, some hotels are starting to offer perks.  Here are a couple of perks mentioned in the article:

Hyatt:

offering spring packages that include complimentary room upgrades, free breakfast or tickets to a luau show.

Hilton:

10,000 Hilton HHonors bonus points offer and discounts for members of AAA and AARP