Not sure how it relates to driving, but I did try a telling little experiment. I had just got in from doing some running around so I was wide awake and feeling fine. 3 turns at the sheep with the following times: .158 , .1738 and .1676.
I drank 1 beer (Heineken), waited 5 minutes and took another 3 turns. Best time: .1852 all the others were just above .2
Quaffed another beer, waited a while and tried again. Couldn't do better than .2205 in five tries! Two were in the high .22's , one was .239 and one was .245. And I was trying!
I weigh 187 pounds, not much fat and I have a pretty high metabolism. Anyone who says a couple of beers has no effect on your motor skills is not dealing with reality.
