Toronto has a building [1] of a very similar size and internal layout that is used as a concert venue and offices for some IT company with conspicuously generic name. The list of people that performed there looks like Rock-n-Roll Hall of fame and it was one of the most entertaining places to visit during Doors Open Toronto. During the visit I realized that graffiti-style artwork inside was done by someone I know.
[1] https://www.888yonge.com/