Does alcohol have any nutritional values?

In a sense. Alcohol is metabolized into acetate by the liver, which is then burned for energy. However, it is burned in place of fat that would otherwise be metabolized. The fat is then stored (one cause of the famous "beer belly"). So, it does provide energy, but at the cost of screwing up your fat metabolism. Since the fat would have been burned in place of the acetate (were it not present) there is no real gain and considerable harm.