Marriott Rewards is offering one free night after every second stay for stays between June 1 and Aug. 31, 2012. Members can earn up to three free nights and registration is required by June 30, 2012. Free nights can be redeemed at any Category 1-4 hotel worldwide and are valid for one year. Free night awards are not transferable and cannot be given as gifts. To be eligible to earn free nights, members must choose points and not miles as their earning preference. The free night for every two stays offer is Marriott Rewards standard summer offer. Some members may receive targeted offers, such as 40,000 points after staying 25 nights, 15,000 points for staying at four different brands or 15,000 points for three weekend stays. Register at http://insideflyerus.wpengine.com/link/?6502