One of the items on the McDonald’s touch screen should be an In-N-Out burger gift certificate. That would do well.
The problem that I see for “fast food” is that the price differential (never mind the quality and general ambiance) between eating there and eating at a real restaurant seems to be smaller than ever. And, with few exceptions (My favorites, Chick Fil A/Subway/Quiznos), it isn’t exactly healthy. It isn’t bad, but it isn’t good either.