Piety alert, piety alert..........I love a good drink, I really love getting stuck-in to a good session, but here's the thing, if I know I'm going to have a drink, even one pint, I don't drive and never have.
It really is very simple.
That said, I'm not convinced a zero limit is a good idea because, for example, you could still have traces the following morning even though you are completely sober and perfectly capable of driving as if you hadn't had a drink for days.