Wow - I went on two high school trips to the Queen Elizabeth Theatre seeing productions of The Taming of the Shrew
& The Caucasian Chalk Circle
. And I saw a "Jack & the Beanstalk" panto at the Jubilee Auditorium when I lived in Calgary as a child & after I moved back there in my mid-20s I saw several concerts at that venue: Juice Newton, the Pointer Sisters, Caterina Valente, Cleo Laine, Mary O'Hara, Tanya Tucker. Sorry - don't have any tidbits about either venue to share: just recall them both as being very nice. Certainly the Jubilee Auditorium & probably the Queen Elizabeth Theatre would have been respectively Calgary & Vancouver's respective top concert venue in 1969.