Have you ever run into street hustlers?
They either try to sell you something, or get you to spend money on a card trick or whatever else.
You could learn a thing or two from them.
In general, hustlers and con men make for great stories and movies but…
…Their “tricks” involve shady ethics at best and criminal activity at worst.
Still, you could really learn something – as long as you stay on the ethical side of it all.