I'm not sure I agree. They made a point on more than occasion to show Zuckerberg at home on his computer while everyone else was at a party. Even at the depositions, he was working during every available moment. In the one scene he was falling asleep in the lab, so, instead of sleeping, he went home to work on Facebook for the remainder of the night.

I believe he was drinking alcohol during some of the work scenes, but there's nothing particularly abnormal about having a few drinks while coding. I even know of legitimate and profitable businesses who support the occasional drinking while coding days.