You can use these Venmo QR codes to donate for parties, events, or even to purchase merchandise.
To Donate or Purchase
Using your cell phone, open up your camera (just like you were going to take a picture).
Point the camera at the QR code and it should automatically direct you to Venmo for payment.
If you do not have Venmo, you will be directed to sign up (this is a free app that works with your bank)