Buffet-Only Restaurant business. Let customers customize their dinners at a buffet restaurant. Business Overview One price, all-you-can-eat buffet-style restaurants have become extremely popular with the budget-minded dinning crowd. Unlike a typical restaurant, a buffet restaurant has one major benefit for the operator -- shorter work hours. Typically, buffet restaurants cater to lunch and supper diners and do not open until 11 a.m. and are closed by 9 p.m. Based on volume, a...