New members who sign up for Marriott Rewards by Dec. 31, 2011 while checking into participating hotels in Asia Pacific, will earn a category 1-4 free night certificate after completing two stays within 120 days of enrollment. The first stay must be in Asia Pacific, but the second stay can be anywhere worldwide. Countries participating include Australia, China, Guam, India, Indonesia, Japan, Malaysia, Philippines, Singapore, South Korea, Thailand and Vietnam.