Counting Calories, But Not For That Margarita

McDonald’s may soon have to post how many calories are in a Big Mac and fries under the government’s new proposed guidelines, but it looks like the popcorn at your local movie theater is off the hook. And so are the alcoholic drinks at your favorite Applebee’s or Olive Garden. Evidently, calorie counting comes to a halt when it’s booze or the stuff you munch while watching “The King’s Speech.” Under the proposed menu labeling rules, you won’t know that …