Union Square has been abuzz with anticipation, and now Five Napkin Burger is ready to open its fourth New York City location at 150 East 14th Street on February 20. Expect the usual indulgences, plus three new burgers (avocado-ranch burger, barbecue burger, mushroom-blue-cheese burger). Also, on opening day, the restaurant will offer 14-cent wings to celebrate the 14th Street location.