One drink can relax me. Any more than 2 and I think it is not good for me to be driving. That is pretty much how the law works though anyway. I haven't really Drank while driving since I have had a GF, when I was single I was out of hand with my drinking and I would drive sometimes while drinking. Not the smartest thing, but I suspect a lot of other people have done these things when they were depressed a little. I have never had any issues at all by the way. I used to leave my car at the bar if I felt too drunk to drive. Unfortunately my friends were not able to handle their booze as many of them racked up DWI's and accidents.