> You can't even order a burger at some restaurants without scanning the QR code.
I have only ever been to one restaurant where this was the case (and it was not a very good restaurant in my opinion, so I do not intend to go back there even if they have a real menu, unless they also improve their food and management), but they provided a iPad to any customer who needed it for this purpose (I did not need it, since I was not alone and was with another customer who had their own iPad). (I think it might be better to post the menu on the wall for customers to read. It might be suitable to use e-paper displays if they sometimes change but not very often; this is more reliable and does not require as much power, nor emit too much light.)
I have only ever been to one restaurant where this was the case (and it was not a very good restaurant in my opinion, so I do not intend to go back there even if they have a real menu, unless they also improve their food and management), but they provided a iPad to any customer who needed it for this purpose (I did not need it, since I was not alone and was with another customer who had their own iPad). (I think it might be better to post the menu on the wall for customers to read. It might be suitable to use e-paper displays if they sometimes change but not very often; this is more reliable and does not require as much power, nor emit too much light.)