I think lots of interesting people played there: Marlene Dietrich, Duke Elington (though that may have been the King Eddie-- I'm not near my reference materials to check it out.
Just found this in Wikipedia:
"Famous legendary performances by popular entertainers included: Marlene Dietrich on her farewell tour, the last performances of Johnny Hodges with the Duke Ellington Orchestra...Count Basie, Woody Herman, Pearl Bailey, Eartha Kitt, Peggy Lee and Ella Fitzgerald, and the first appearances doing comedic impressions in 1982 of future Canadian star, Jim Carrey."
I have to admit I was never there though I lived in Toronto for 15 years. Apparently they once refused admission to Bob Dylan for not wearing a tie so they probably wouldn't have let me in even if I could have afforded to go. ( I was refused admission to the Colonial Tavern once for wearing jeans when I went to see Ornette Coleman! Had to wait till I moved to Santa Barbara to first see him.)