The interesting thing is most of my friends have at least one DUI. Some have 2 and I know one person with 3. I personally don't drink and drive because I just hardly drink at all. But no other industry has their employees paranoid about DUI's than the Pharma industry ... ok maybe truck drivers even more.
But the point is, my friends who are engineers, accountants, finance, etc have not once worried about the consequences of a DUI on their job. They're more concerned about legal fees and dealing with license suspensions or restrictions.
I'm not condoning drunk driving but these days I doubt any legal matter is as common as DUI's. It's just too easy to pick one up when just about everywhere is an alcohol related advertisement and served until 2 am in the morning. Our own company events are filled with Alcohol.
With that said abstinence is the safest route otherwise you either have a DUI or lucky that you have not gotten one.