Years ago, there was a man who would stand on Market St. wearing a suit and just kind of dance back and forth singing "Gotta keep smiling". It wasn't a song as such, just a refrain that he would roll around over and over, and he would shuffle and sing and point at passersby and smile, encouraging them to smile.<p>One day my dad stopped and asked him, "You seem sane and well-educated, why do you do this?" (I'm paraphrasing here.) The man told him, "Sir, I make a hundred dollars a day, tax-free."<p>(My dad saluted him and walked on.)