Don't know if others might want to participate, but mention of payphones in another thread got me a thinking that there just isn't that many payphone booths around in Calgary anymore.
I'm not talking about wall mounted payphones like one might find outside of a 7-Eleven but actual payphone booths although finding a payphone booth with actual doors might prove to be even more difficult.
So here's one that I know still exists on the NE corner of 16th Avenue and Centre Street - don't think it has doors though. Google Maps link.
edit: Payphone booth count in Calgary now stands at 7 working and 1 unknown status per this thread, none with doors as best as I can tell.