A waitress we just had a few nights ago held her breath until we picked up the little cards with the QR coding and we then pulled out our phones. It's nice to show these young whippersnappers that some of us old dogs will surprise you with some of the tricks we know.
@Dufferman , the establishment has to have full-size, printed menus available. Date nights also mean to us no phones on the table during dinner so they need to accommodate the couples that are dining and don't have phones with them.