The American Museum of Natural History will again host its wildly popular adults-only sleepover adventure. Built on the successful A Night at the Museum sleepover program, adults ages 21 and up will enjoy a more sophisticated version of the popular event. The overnight adventure will begin with a champagne reception and music provided by the 12th Night Jazz trio in the Theodore Roosevelt Memorial Hall. Explorers can expect to roam through the nearly empty halls of the Museum, where they might run into a herd of elephants in the Akeley Hall of African Mammals or come face to face with looming dinosaur skeletons, including a 65-million-year-old Tyrannosaurs rex.