Free Drink at New York New York in Vegas by Showing This

I was on my Southwest flight recently and noticed this ad on the back of the drink menu:

You can show this picture and get a free wine, beer or well drink only at New York New York in Vegas at Pour 24, Center Bar, Nine Fine Irishman, or Lobby Bar. Valid until 12/31/14.

If you are in the area then go get your free drink! Its hard to see but the code is 199108809