@RMiddleton
Also, no, I will not order and pay with a QR code taped to the table so you or some data scraper can gather more data about me. I've walked out of more than one place that required payment via QR, two of those times were on dates, even. (It's becoming quite common practice in the Bay Area.)
There are so many reasons someone might not have a smart phone linked to a credit card. Requiring this just to go eat a meal at a restaurant is exclusionary. Yeah, Mr. Restaurant Owner, you're telling my elderly parents that you won't serve them, so you're not serving me either, bye.