After receiving a major private-equity investment last year, this rock 'n' roll-infused sports bar is set to open more than a dozen new units in coming years. The chain specializes in burgers made with a blend of Angus beef and brisket, with a wide variety of sauces and toppings. Burger & Beer Joint, which menus more than 75 beers, also offers a 10-pound Mother Burger that’s free if diners can finish it in under two hours.