At Concierge2GO.com we print QR codes on the back of Hotel room keys in the top 56 cities in the United State. We provide mobile concierge for several of our Hotel partners in these cities. When a visitor scans this QR code it takes them to our main page at Concierge2go.com. From our main page, they simply drop down our "City" list and visitors will find thousands of things to go, see and do from our listings.