to go ring up your dinner? I have had my card info stolen once (and it was at a restaurant). I cannot imagine turning over ALL my cards to a waiter who with the press of a button can cycle through my cards and swipe them through a reader to lift the info from each card. So instead of dealing with one card company, I get to spend a couple weeks dealing with all my card companies. Yeah! Unless they have a secure means of locking on one card, this has a serious drawback.