There's a myth that drinking coffee or consuming other forms of caffeine will help sober somebody up. However, a report from Arizona State University states that this myth is not true and while a person may feel more alert after drinking a shot of espresso, the person's blood-alcohol level will remain unchanged with the caffeine.
According to ASU, a person's BAC level only diminishes at a set, slow pace as the liver metabolizes the alcohol that has been consumed. Taking a shower, exercising, or getting a burst of energy in an alternative way has no effect on how alcohol is metabolized, hence the best way to sober up is to simply wait.

