Oak Barrel Public House in Milwaukee, WI. Oak Barrel is an American Public House located in the heart of Downtown Milwaukee on historical Old World Third Street. Just blocks away from the new Bucks arena, Fiserv Forum, convention center and Milwaukee Theater Oak Barrel is walking distance from any event in the downtown area. Our menu covers all of American’s classic comfort foods: artisan pizzas, tacos, smash butter burgers, and several classic American entrees. Come check out our extensive craft beer and whiskey list as well!