Cite please! I don't believe that to be true. You can be stopped for riding while drunk, but whether you are drunk or not is judged by a policeman rather than using the same breathalizer limits as apply in a car. It *can't* affect your driving licence. Especially if you don't have one ;-) And how dangerous it is depends on how much you have drunk and what sort of route you take home. It's perfectly possible to be under the legal limit and prefer not to drive but be happy cycling, many people I know won't drive if they've had *anything* to drink, but seeing as they're only risking their own life and limb on a bike (and not very much at that given how much slower you're moving than in a car) they don't mind quite so much about cycling.