Daron Malakian joins Peephole onstage in Chicago bar to sing Cigaro

System of a Down guitarist Daron Malakian surprised patrons at a Chicago bar late Saturday, Aug. 30, when he wandered into The Cubby Bear near Wrigley Field and spontaneously joined local tribute band Peephole onstage to perform the SOAD track Cigaro. The impromptu appearance came the night before System of a Down was scheduled to play two stadium shows in the city.

Malakian described the encounter as entirely unplanned in an Instagram post, saying he and a companion had been taking photos near Wrigley Field when he heard the opening riff of Needles coming from a nearby bar. "None of this was planned," he wrote. "I walked right to the front of the stage and surprised the band and the audience. I joined the band and sang Cigaro, shook their hands, took some pictures with the fans in the audience, and walked out of the place." He added that the odds of the moment happening were slim, writing that "probably had a better chance of getting struck by lightning."

Video clips and photos of the brief set circulated on social media, showing Malakian performing with Peephole and taking selfies with audience members. Peephole posted their own account of the moment, calling it "the...