I researched the Empress Theatre which stood at Gore and Hastings in Chinatown. It was built in 1908 and demolished in 1940 (info from Changing Vancouver blog).
There were several posters found under the floorboards of the blue cabin which advertise the Empress Theatre. I've deduced that these shows date from 1927, and the following four posters are all from the same year. That means in May, the Empress was showing a play per week - even two!
At the City of Vancouver Archives, they have some pamphlets and newsletters published by the Empress.
I spent a few hours just leafing through and reading all the available weekly newsletters from around 1922 to 1925. I lost track of time while just browsing. I found even the ads were interesting - at first I couldn't tell what were ads and what was the main body, but I soon got used to the way it was structured. There were ads for the Timms Print Shop, which was printing the newsletters (1000 per week!)
On the page above, you can see all the "answers to enquiries" which readers had written in. You can also see an ad for the Orpheum Theatre, which might have been somewhat of a rival theatre in the same neighbourhood. I also noticed quite a few ads for political candidates which stressed "sane" and/or "logical" leadership, language which would seem strange today.