So, a co-worker and I were grabbing coffee out of our free coffee machine, and saw that a dollar was folded up and left on the counter near the machine. Each of us assumed the other had dropped it, but we quickly realized it belonged to neither of us.
We immediately began discussing the ethical dilemma of "found money."
But, hey, why not have fun with the situation? I added a dime. Whoever left that dollar, if they come back, will find it has grown 10%. Will they leave it there in hopes it grows further? Will people begin to think there's a need to leave money to pay for their coffee?
Either way, the laughs we got more than paid for the ten-cent investment I just made (but will it pay for the opportunity cost of not taking the dollar? Hmm....).