It just makes sense...

About eight months ago, Ethical Bean Coffee Co. started putting "quick response" codes in its train ads. When customers scan the little squares with their smartphone cameras, a coffee menu pops up on their screens. Then they can order a cup of coffee on the train—and have it waiting when they arrive at one of Ethical Bean's shops.

Business has doubled since then, says Chief Executive Lloyd Bernhardt. "We catch people who are on the go and don't have a lot of time," he says.

(via The Wall Street Journal)