From humble D.C. origins, Five Guys has grown to become one of America’s most popular fast-casual burger joints. It’s no surprise to Washingtonians, who have enjoyed their fresh, juicy burgers and Cajun-spiced fries since 1986. A cult following ensued, comparable to SoCal’s In-and-Out Burger, Colorado’s Smashburger, Texas’s Whataburger, and New York City’s Shake Shack. The personalization of each burger with toppings and sauces is part of the fun. Order off the "secret menu" for indulgent concoctions like the Double Grilled Cheeseburger, a cheesy patty between two grilled cheese sandwiches. Or try President Obama’s favorite: a cheeseburger with lettuce, tomato, jalapenos, and mustard. Those with nut allergies, steer clear: The fries are cooked in 100 percent peanut oil, and complimentary peanuts abound.