Question: John Belushi met Dan Aykroyd while working at what Comedy club best known as the first ever on-going improvisational theater troupe based in Chicago.
Sentence (from "The Blues Brothers"): Belushi and Aykroyd, respectively in character as lead vocalist "Joliet" Jake Blues and harmonica player/vocalist Elwood Blues, fronted the band, which was composed of well-known and respected musicians.
Relevant evidence: No