So while I find that idea interesting, I would rather prefer knocking or texting on the doorstep of peoples homes. I might have a situation where the QR Code m

So while I find that idea interesting, I would rather prefer knocking or texting on the doorstep of peoples homes. I might have a situation where the QR Code makes sense though. I'm renting a location for a party at the top of a building, which is only accessible by transponder cards. So there is no door bell or anything. Instead of having someone letting the guests in, this could be an alternative.