Tagstand, a startup which helps companies integrate NFC tags into products and events, threw a massive cocktail party in New York to show off their capabilities.  While details of the tech are sparse, from the picture above, it appears that Tagstand used the Adafruit PN532 NFC/RFID controller breakout board powered by an Arduino.

From a writeup of the event on TechCrunch:

[Tagstand] will see its technology used to enable some nifty actions for the 3,500 guests, like tapping to tweet, posting pictures to Facebook and registering “likes” for the cocktails they’re drinking. Sounds like (kind of geeky) fun!

The event in question is New York’s big cocktail party for the opening night Gala at The New York Public Library, which is offering up 30,000 different cocktails, created by over 150 different bartenders. (Now you can see why “liking” a particular cocktail might come in handy – that’s a lot to remember.) In fact, after a guest likes a cocktail, they’ll be able to receive the drink recipe via a personalized email courtesy of foodie guide Tasting Table.

Pick up the Adafruit PN532 NFC/RFID controller breakout board here, or if you prefer, an Arduino Shield version here.