There is a new place in Luang Prabang .  "The House" restaurant & bar (they also use the name "Banana") is a casual place for open air dining (when it rains you can run inside too.) It's conveniently situated at the Nam Kan river side of Phousi Hill.  It not only serves cocktails and wines but also provides food.  They have a real Belgian chef and have meals for every budget. They also have music.