A person can sober up by drinking coffee or other caffeinated beverages. Taking a cold shower or some fresh air can wake you up but not sober you up. Two people drinking the same thing will react in the same way. It's OK to drive after just one drink. You're not an alcoholic unless you drink a pint of liquor every day.
Alcoholism is an illness.
More drunk drivers are on the streets in the evening on Friday and Saturday nights than at other times of the day. Alcohol is a depressant. And although caffeinated beverages can wake you up, they have no effect on the amount of alcohol in the body or on the effects that alcohol produces in the body. Waking up the system does not sober you up. There is no way to speed up the process.