If you like shopping, snacking and social media, Saturday’s Shop, Drop and Drink event is sure to be a trifecta of fun. Here’s how it works: Download the Domino app for your smartphone, and then snap a photo of an item you want to buy in a participating store and post it to your Facebook timeline. The app will unlock the deal for that store. Specials include free mini-sundaes at Momofuku Milk Bar, 10% off at Whisk, 15% off at Bird, two-for-one bloody marys and beers at Nita Nita and 20% off Horizons Vintage. Go forth and conquer Bedford Avenue!