Chicago in the Roaring Twenties was a city of immigrants, mobsters, and flappers with one shared passion: the Chicago Cubs. It all began when the chewing-gum tycoon William Wrigley decided to build the world's greatest ball club in the nation's Second City. In this Jazz Age center, the maverick Wrigley exploited the revolutionary technology of broadcasting to attract eager throngs of women to his renovated ballpark. Mr. Wrigley's Ball Club transports...