In the early 1970s, the Minneapolis music scene was no scene at all. Radio stations played Top 40 music; bars and clubs booked only rock cover bands and blues bands. Meanwhile, cities like New York, Detroit, and London were spawning fresh and innovative—and loud and raw—sounds by musicians creating a new punk and rock movement. A small but daring group of Twin Cities musicians, artists, entrepreneurs, and enthusiasts wanted a piece of that action. To do it, they had to build...