In 2004 Chef Keller was invited by Mandalay Bay Hotel and Resort to to recreate his San Francisco Fleur de Lys. The partnership of the resort and Keller also resulted in the first Burger Bar in 2004. He was the first great chef to give burgers the haute cuisine treatment, from freshly ground, hand-shaped burgers to a menu of innovative toppings in a hip, casual setting. A second Burger Bar opened in 2007 in in . A third Burger Bar with a spectacular view over opened on the sixth floor of Macy’s in in 2009. More Burger Bars are on the drawing board. Keller, sensitive to the changing tastes of the dining public, reimagined his original restaurant and, in 2010, created Fleur by Hubert Keller, a small-plates restaurant featuring tastes from around the world.