https://www.mercurynews.com/2019/12/12/shake-shacks-third-bay-area-location-opens-this-weekend/

Shake Shack, the cult-favorite burger restaurant that started out as a hot dog cart in New York’s Madison Square Park, will open its latest Bay Area outpost this Sunday, Dec. 15, at Hillsdale Shopping Center in San Mateo.

The eatery founded by New York restaurateur Danny Meyer — he’s the guy behind high-end places like Gramercy Tavern — quickly became known for its all-natural Angus beef burgers. However, there’s still an all-natural Vienna beef “flat-top dog” on the menu — along with cage-free chicken sandwiches, crinkle-cut French fries, a popular array of frozen custards, plus wine and beer.