David Furnish is going into the hospitality business. We’re told the filmmaker and husband of Elton John is starting construction on a high-end champagne lounge and bar at Caesars Palace in Las Vegas. Furnish — credited with helping Sir Elton become sober — will be working alongside New York nightlife notable Michael Greco, who has worked on projects at The Palms and with Pure Management. The space will open in the fall and will house pieces from Furnish and John’s extensive private art collection.