This was a very interesting comment. I do not think I would race on a bike better after doping up with a six pack anymore than I would drive better after ingesting a six pack. I found it a rather funny concept. Yes, to watch a race with a bunch of intoxicated bikers would make the race a bit more interesting.
Running has something like this. They call it the beer mile. It takes place on a track, and you have to drink a beer before each of the four laps. http://www.beermile.com/
It's explicitly done as an individual race (or at least, all of the videos I've seen have been individuals). I think with biking, you would want to do something similar for safety reasons. Maybe start people at intervals with beer in a camelback or similar, and they have to have finished all of the beer before the cross the finish line.
Just a little reaction on doping in cycling, a friend told me about the "Screeny Weeny" (would love to add the link but iI cant) which I thought was hilarious. They literally made a fake ****, to pass a drug/doping test...