WorldHotels, the Americas, has announced its “Mad for Miles” promotion, in which guests can earn 500 miles per night — rather than per stay. The promotion runs through April 30, and is open to guests who are members of United Mileage Plus, Northwest WorldPerks, Delta SkyMiles and American AAdvantage. Frequent flyers must provide their membership number at check-in to receive the miles.

For more information or to make reservations, visit online at http://www.worldhotels.com or call toll free at 1-800-223-5652 in the U.S. and Canada.