Hilton HHonors members can earn double points on weekday nights and triple points on weekends (Friday, Saturday and Sunday nights) for all stays between July 9 and Sept. 30, 2013. Registration at http://HHonors.com/Triple is required prior to checkout. All Hilton brands are participating but not every hotel is participating. Visit http://www.HHonors.com/Triple to view a list of hotels that have opted out of the promotion.