You’ve gotta read this article:
Endo, who works at hectic Shinagawa Station in central Tokyo for Keihin Express Railway Co., sits in front of a laptop computer with a digital camera mounted on top. At first she is a bit grim-faced, and the verdict from the company’s smile-rating software is instant and candid.
“Smile: 0” pops up on the screen.
She breaks into a broad grin and the computer responds cheerfully, giving her a score of 70.
What a corny yet brilliant idea!