opium bed
n.— «The Backyard is punctuated with palm trees and so-called opium beds, which resemble open-sided concrete pillboxes and feature upholstered mattresses and flat-screen TVs. During the height of swim season, the poolside opium beds and cabanas can rent for up to $200 a day, but they can often be used at no charge in the winter months.» —“A cozy, out-of-the-way casino-hotel” by Bill Ordine Philadelphia Inquirer (Pa.) Feb. 26, 2006. (source: Double-Tongued Dictionary)