The towel folding! Hahaha. I worked a night job once, folding clothes for Abercrombie & Fitch. That was the entire job: immaculately folding the same clothes over and over again that the customers would mess up throughout the day.
To this day (almost 10 years later) I still fold my clothes exactly to their specs.
It's great too, because a number of my friends worked that same job at one point or another. They'll come over sometimes and catch me before I've had a chance to put the clothes away yet, take one look at it as pangs of terror coil up their spine, instantly recognizing and remembering one of the most tedious least prestigious jobs any of us have worked, and just start shaking their head like "dude.. no."