Pint on your lunch break?

Depends how much I have. Coding after 1 pint seems to get the creative juices going and productivity goes up. I'm more likely to take a chance on a particular course of action rather than procrastinate.

More than 1 is bad - things go downhill pretty rapidly - judgement and quality are affected.

You seem like a stand up guy Chris so you probably haven't tried what I'm about to suggest:

Coding after 1 or 2 spliffs is amazing, you are unable to get frustrated and therefore can continue coding for a long time. I hate coding stone cold sober because I just want to punch everyone and everything. It's so frustrating!