Friend of mine used to drink quadruple espressos at Starbucks every day, then go back to work. I was talking to him last week and told him about remembering the time he called me from the Starbucks and his name was called with the quadruple order. He laughed and said he actually bumped it up to quintuple at one point.

Then he sold his house and moved to another state, living out in the woods. Asked him how he managed without a Starbucks nearby. He said he now does Keurig espresso shots every morning. But it was getting expensive, since he had to press 10 pods in one sitting!

Moral of the story: he's perfectly functional and productive. Go nuts!