Rio state adopted a law last week requiring restaurants and bars to offer physical menus for clients who lack smart-phones, have technological troubles or simply want to take a break from their devices. "I prefer QR code. I think it's much more practical," says, 28-year-old Paula Cardoso, at the classic Rio de Janeiro restaurant Armazem Sao, which takes pride in its menu. It's a touchy topic in a world suddenly dominated by digital dining. IMAGES AND SOUNDBITES