Alipay has QR code readers which are basically a lightbox with a camera in the back, you can activate your mobile payment app to show the barcode, and place you

Alipay has QR code readers which are basically a lightbox with a camera in the back, you can activate your mobile payment app to show the barcode, and place your phone against the glass, and this avoids the awkward placing and angling of a handheld scanner to scan the phone. I think some versions have lights too, so the barcode is visible. https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Fsc01.alicdn.com%2Fkf%2FHTB1Dgi1m8jTBKNjSZFu7620HFXa0%2F229126686%2FHTB1Dgi1m8jTBKNjSZFu7620HFXa0.png&f=1&nofb=1 https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2F... I guess one could get a Raspberry Pi with camera, and 3D print such a box (or order from AliExpress). Install a QR code reader software that can talk to Spotify, and print some cards, ideally with QR codes on both sides. The end user would just have to place the card on the glass to get music to play.