It's a simple concept: deprive people of their sight in order to enhance their sense of taste. At Dans Le Noir restaurants (in the dark in French), the dining room is utterly, completely pitch black. All food is served by blind waiters and the menu is generally a surprise (in more ways than one). Diners report heightened sense of taste and texture, as well as lots of spilled food. The concept has proven successful, with restaurants now open in 7 cities around the world.