For most of the 20th century, if you wanted to point to an actual American style of beer, you had to face San Francisco. Steam beer, a frontier concoction brewed fast for thirsty gold miners, became a signature of the city. Many breweries made it in the latter half of the 19th century, but they all died out, save one: the Anchor Brewery, which was rescued from bankruptcy in 1965 and helped jump-start craft brewing in America.