Sad to hear that. However, I caught that scene I think right at the tail end of what was its peak period and before the 90s economic slump. Cafe des Copains/Montreal Bistro, Bermuda Onion, Top O’ The Senator plus that cafe on Danforth I think (correction - it was George’s on Dundas) where Moe Kofmann used to have a regular gig. All of these had regular jazz - and then there were the smaller outlying places like Chick n’ Deli plus you could catch occasional gigs/broadcasts by e.g. Dave McMurdo’s Orchestra at A.G.O. And then there was the free stage stuff at the Summer DuMaurier Jazz Festival (where free meant the likes of Tony Williams Quintet and Loose Tubes - a rare instance of Ontario taxes put to good use ).
At that time, the local jazz scene was way more active than Vancouver, although Vancouver did have its local scene, as did Windypeg and Edmonton, which were stops for prominent touring US groups.
Re: the Rex, I probably just had bad luck with that service as it was just the one time. I could usually rely on an enjoyable hour or two there, it was laid back, accessible and generally friendly.