When New York City passed the first menu labeling law in 2008 to combat obesity, it didn’t change the number of calories people consumed, found a 2009 study published in Health Affairs, an academic health policy and research journal. But when restaurants offered lower-calorie meals, people would choose them over higher-calorie fare, a 2011 study published in the British Medical Journal found. That’s what Healthy Fare for Kids, a Chicago-based organization, is trying to promote.