292 Brunswick Avenue (second floor of the Tranzac Club)
I went and visited the Toronto Zine Library while I was in Toronto over the summer. It was cool to see another zine library, as I don't think I'd been in one since I left Halifax last year (get it together Vancouver!).
To be honest, it was so long ago I barely remember much of it, though I did get to go to Zine Dream in the Tranzac Club (in the same building). It was a kind of neat event, but it was filled with people selling art prints and expensive art zines and stuff I'm not that into. I'm not opposed to people making that sort of thing, I'm just not that interested in buying/reading them.
I did get to meet the creator of Gender Fuck What, which was neat. I got their new zine though, so look out for a review of that at some point on 365 Zines a Year. I also got some rad zines about zine libraries, and I'll have a list about those on zinelibraries.info soon(ish).