Wikipedia: , french fries, milkshakes and similar foods. The first Shake Shack located in Madison Square Park opened in July of 2004.. Since its opening, Shake Shack has proven popular with New Yorkers, even garnering the distinction of being named Best Burger 2005 by New York magazine.. During the summer, the wait in line for service can stretch to over an hour, especially on weekends when the weather is pleasant. Their website has a webcam which shows the current line in real time. In 2007 the Shack began selling wine. Citi Field, the home of the New York Mets baseball team, features a Shake Shack concession stand. On top of the Citi Field Shake Shack sits the model of the New York City skyline that used to sit on top of the scoreboard at Shea Stadium. In 2008, a Shake Shack was opened on the Upper West Side.