Dick, just because one driver managed to drive ok after two pints on one occasion doesn't mean it's safe to assume everyone can do it anytime. The law has to be such that it can apply to anyone, anytime. Two pints will affect a teetotaller significantly more than it would an alcoholic, for example. I think that point has already been adequately covered, but for a person to be unaffected by two pints, they would have to have previously built up quite a strong resistance to the effect of alcohol. If they actually need that amount to adjust their reactions etc. to a 'normal' level, they are probably alcoholics, or at least well on the way to being so, depending on one's definition.

Stringsinger is absolutely right: 'Don't drink and drive'. It's a crying shame we even need a law to enforce what should be no more than basic common sense.

If your own driving suffers when you drink coffee, then my advice would be not to do it, even if it's only for your own sake.