A QR code is a 2-dimensional barcode that can be scanned by a smartphone or similar device which can be used to take the user to a webpage. These are useful to put on posters and other promotional material to encourage people to access more information without asking them to type in a URL.
This points to: http://www.jugglingedge.com/event.php?EventID=888
This points to: http://www.chocfest.net/