If you had a long boozing session, how long would it take to stop smelling of ale?

Well you wouldn't smell it on yourself. I'd say after 36 hours I'd take 12 to put something in my tummy and a good shower. I'm sure you'll get mathmatical and other answers about metabolism and stuff like that. Don't believe them. I put away at least 30 Icehouses on the weekend. I know what drunk is. You need about 12 and a good shower.