Nestled among the sleek, high-concept restaurants of Mandelay Bay, the Burger Bar offers gourmet takes on that reassuringly solid American classic, the hamburger. Although the restaurant is more casual than its neighbors - nods to the classic diner aesthetic come in the form of retro neon clocks, cozy wooden booths, and a long counter for bellying up to - there is nothing ordinary about these burgers. Specialties include the Hubert Keller bison burger with caramelized onions, blue cheese, and spinach, which is named after the renowned French chef who conceptualized the establishment. Purists will appreciate the classic Kobe beef burger, where the focus is placed squarely on the top-quality meat. The streamlined menu concentrates on diner classics, with some nods to visiting vegetarians or lighter diners in the form of salads and low-carb options. Even on the dessert menu, the emphasis is on burgers and their companions: sweet options include a chocolate burger, a peanut butter and jelly burger, and a range of thick milkshakes. An extensive beer and cocktail list rounds out the menu.