Many moons ago , i ran my first half marathon after helping my mate demolish a barrell of home brew
the night before the race(and they reckon binge drinking is a new thing). Nowdays, I've run ten marathons and had a couple of pints of guiness the night before all of them.
A rule of thumb is the same as the police breathalizer, it takers an hour for the alcohol in half a pint of
average beer too leave the system. However,alcohol is a dieretic,so drink more water to retain maximum hydration