Grilled, seasoned, and served to perfection, Tulsa’s Arnold’s Old Fashioned Hamburgers is a prime burger joint located at 51st and Union. The healthy menu items at Arnold’s Old Fashioned Hamburgers will leave you with a full stomach. Both the young and the young-at-heart will dig the family-oriented menu and ambience at this burger joint. Take your meal to the next level on the patio at Arnold's Old Fashioned Hamburgers.