National Novel Writer's Month

It depends so much from person to person that it's impossible to give you any one definitive answer. If he isn't used to drinking at all? I'd probably give you six to ten pints as a low-range estimate, with the caveat that I'm also a very small woman, and my 6'+ very fit boyfriend is used to drinking so not too useful a guideline for you. But I've known men who are three sheets to the wind after four, and men who don't drink and can down fifteen without any noticeable affect, it varies so much.