(TheNewYorkTimes) - Some restaurant chains are turning to the bottle during the rough economy, but the liquoring up has produced mostly headaches, not happiness. Outlets that specialize in quick and cheap daytime meals — including Starbucks, Sonic and Guy & Gallard, the New York chain — have been experimenting with adding alcohol to their menus. Pret a Manger, the British sandwich maker, is considering adding wine in its new Paris stores, and Burger King last year began selling beer at its more expensive Whopper Bars in the United States.