More hotels are recognizing the potential boost in ancillary revenues from positioning their facilities to attract local business. Marriott's Workspace on Demand program, for example, allows groups to book unused public spaces by the hour for meetings. "Most hotels, lobbies and boardrooms, a lot of them sit empty during the day. Why not allow people to come in during the day and allow them to use our space? It creates awareness, generates food-and-beverage sales -- all types of things," said Peggy Roe, a vice president at Marriott International.