Facedeals app allows cameras in local businesses to recognize you.

The Facebook camera requires people to have authorized the Facedeals app through their Facebook account.

The Facedeals app must be authorized via your Facebook account. With your help, the app verifies your most recent photo tags, using those to map the physical appearance of your face. Our custom-developed cameras then simply use this existing data to identify you in the real world. Personalized deals can now be delivered to your smartphone from all participating locations—all you have to do is show your face.

Your smartphone notifies you of a customized deal based on your Like history.
A promotional video created to promote the concept shows drinkers entering a bar, and then being offerend cheap drinks as they are recognized.
'Facebook check-ins are a powerful mechanism for businesses to deliver discounts to loyal customers, yet few businesses—and fewer customers—have realized it,' said Nashville-based advertising agency Redpepper. 
They are already trialling the scheme in firms close to their office.
'A search for businesses with active deals in our area turned up a measly six offers.
'The odds we’ll ever be at one of those six spots are low (a strip club and photography studio among them), and the incentives for a check-in are not nearly enticing enough for us to take the time. 
'So we set out to evolve the check-in and sweeten the deal, making both irresistible.'We call it Facedeals.'
http://www.dailymail.co.uk/sciencetech/article-2187801/Were-watching-The-camera-recognise-Facebook-picture-time-walk-shop.html

http://redpepperland.com/lab/details/facedeals