Who could forget?
Rolling Stone explains:
Forty [one] years ago this evening, a doubleheader at Chicago’s Comiskey Park devolved into a fiery riot when crazed fans stormed the field as part of anti-disco promotional event dubbed Disco Demolition Night. The whole thing was the brainchild of disc jockey Steve Dahl, who dressed up like the general of an anti-disco army and called his followers “The Insane Coho Lips.”
Dahl thought the demonstration would consist of simply blowing up some disco records on the field between games. It was a scheme cooked up between the radio personality and White Sox owner Bill Veeck, who was desperate to increase attendance at the ballpark in the middle of a lackluster season.
The game sold out, but thousands of additional ticketless fans showed up to voice their hatred of an entire genre. Many stormed the gates and filled the ballpark way beyond capacity, setting up a dangerous situation when Dahl blew up the disco records. Fans threw firecrackers and bottles onto the field, eventually storming onto it, starting fires and battling with police. The second game was eventually called off amidst the madness.
[F]or minority groups, the incident had highly disturbing undertones given many of the perpetrators were white men and the genre was incredibly popular amongst homosexuals, blacks and women. “It felt to us like Nazi book-burning,” Chic’s Nile Rodgers once said. “This is America, the home of jazz and rock and people were now afraid even to say the word ‘disco.'”
Not Chicago's finest hour, despite the White Sox forfeiting a game because of their own bad management.