All I ever needed to know in business, I learned in a strip club.
learntoduck.com
learntoduck.com
That's right. It's almost freakish how our inventory management system is exactly like pole dancing.
On a more serious note, stripping/prostitution/etc are some of the oldest professions and hencely the oldest business models. Also, they're purely in the instinctive/social space, where us geeks are usually weakest.
For that, it's a good article.