Shake Shack

Shake Shack is an American multinational fast casual restaurant chain based in New York City. It started out as a hot dog cart inside Madison Square Park in 2001, and its popularity steadily grew. In 2004, it received a permit to open a permanent kiosk within the park, expanding its menu from New York–style hot dogs to one with hamburgers, hot dogs, fries and its namesake milkshakes. (Wikipedia)