Many people feel that .08 is still too low, and they operate a vehicle with no problems at that level. As a Class A driver I have to abide by the .04 rule whether I'm in a semi-truck or personal vehicle.
For the most part though, I agree with the whacky fuck aka Debussey. Why have any alcohol while behind the wheel?
However, I see no problem in having 1-2 beers, a shot or some combination thereof and being able to drive home 3-4hrs later. In my case, if I had a beer, and a shot, then drove home about 2-3hrs later, I would probably still be legally drunk @ .04.