Shake Shack is an American fast casual restaurant chain based in New York City. It started out as a food cart inside Madison Square Park in 2000, and its popularity steadily grew. It eventually moved to a stand within the park, expanding its menu from New York-style hamburgers to one with hamburgers, hotdogs, fries and its namesake milkshakes. The company prides itself with using 100% pure all-natural high-quality Angus beef only in their Burgers, emphasizing that its meat is completely free of hormones and antibiotics.
Since its founding it has been one of the fastest-growing food chains eventually becoming a public company filing for an initial public offering of stock in late 2014. Initial price of its shares was at $21 immediately rising by 123% to $47 on their first day of trading.(Wikipedia)
"At Shake Shack"