WASHINGTON — Don’t want to be confronted with the number of calories in that margarita or craft beer? Then avoid the menu and order at the bar. New menu labeling rules from the Food and Drug Administration will require chain restaurants with 20 or more outlets to list the amount of calories in alcoholic drinks, along with other foods, on menus by next November. The idea is that people often don’t know — or even think about — how many calories they are imbibing. But the rules don’t …