Yup, the Burger Bar located in the Mandalay Bay in Vegas was awesome. Build your own burger any way you like, all kinds of toppings including a fried egg, 8 different cheeses, 5 different buns, 4 kinds of bacon, skinny fries, fat fries, sweet potato fries, 5-beer samplers at the bar, great atmosphere and more!
You can check out the menu here...
http://www.usmenuguide.com/burgerbarmenu.htm