How many steak n shake restaurants are there in the world?

As of my last update, there are approximately 600 Steak 'n Shake locations primarily in the United States. The chain has experienced fluctuations in its number of restaurants over the years, with some closures and openings. While it had a presence in international markets, the majority of its restaurants are concentrated in the U.S. For the most current count, it's best to check the official Steak 'n Shake website or recent company announcements.