If the name of this new counter-service burger joint sounds a bit corny, one step inside will provide some clarity: the cornball factor is completely intentional. Trying to pull off a fifties diner theme is no easy feat, but Mr. Hamburger manages to succeed. The decor, music, and employee uniforms certainly help; the fifties-era Bryan Daily Eagle reproductions covering the walls certainly kept us occupied. Best of all, the thin, hand-formed beef patties were just the right amount of greasy, with lots of flavor to boot. The wide assortment of burger toppings are more 2018 than they are 1958, but we forgave the anachronism as we savored the grilled onions, mushrooms, and chipotle mayo of the Warden Burger.