Philadelphia joins California and New York City in making it easier to find out how many calories you’re getting when you eat out. The Philadelphia City Council passed a measure Thursday that requires restaurants to post calories on their menus. Starting on January 1, 2010, chain restaurants with more than 15 locations will have to put the calorie counts on menu boards and put calories, saturated and trans fat, sodium and carbohydrates on printed menus.

What do you think of the idea? Should all cities do the same?