Boom Chicago is a sketch and improvisational comedy theater, founded in Amsterdam in 1993 by a group of American tourists, who named it after their hometown. In the beginning, the city of Amsterdam refused to include it into the official list of Dutch theaters, because Boom Chicago was considered "foreign." Boom Chicago's comedy show has since become a part of the city's cultural life, creating long-running stage performances which number among the biggest in Amsterdam in terms of ticket sales.