I have decided to add some kind of tipping sign this weekend, as I do feel I am leaving money on the table so to speak. I have received cash tips which are nice, and were not solicited in any way. They were just people handing me a cash tip. If I offer any amenities, it would be a phone charger, and I do open doors for folks. I've thought about gum at least for the bar crowd, but I am still undecided. I would like to start offering some way of a cashless tip, such as a Square reader, but until I can source one, that leaves me to find an interim option. I remember seeing something about using a QR code for Paypal transactions with a preset amount someone mentioned here. Does anyone have any info on this. My google-fu is failing me.