On this day in 1979, a fun MLB promotional event quickly devolved into the most infamous and controversial event in disco history. In the late 70s, dance-oriented disco was one of the most popular musical genres in the United States. Seminal films such as Saturday Night Fever and Disco Godfather greatly influenced the music scene, while artists like the Bee Gees, ABBA, KC and the Sunshine Band, and Donna Summer became repeated record plays for many. While disco provided a fun, novel outlet and style of dress to many people, it sparked major backlash from fans of rock music. Critics at the time often feared that the rise of the disco would quickly lead to a decay in rock after disco albums dominated the 21st Grammy Awards in 1978. When Chicago’s WDAI-FM switched from rock to disc...