Guests at Waldorf Astoria Hotels and Resorts can receive a free night when staying from three to seven nights at 23 participating properties worldwide through Sept. 6, 2010. Plus, kids under 18 stay free and receive complimentary breakfast during the stay. The minimum night requirement varies by hotel. For example, guests at The Roosevelt New Orleans and Trianon Palace in Versailles, France receive a third night free on stays of two nights whereas most locations require a minimum of three nights to earn a complimentary night. Stays at Edgewater Beach Hotel, in Naples, Fla.; Grand Wailea, Maui, Hawaii and The Beach House Maldives, Manafaru Island, Maldives require six nights in order to receive the free night. Use promo code PBWA1N when booking online at http://www.insideflyer.com/link/?2486 or mention “Best of Waldorf Astoria” when booking by phone.