The back room at Fun Haus (formerly Zen Lounge) hosts an awesome psy-trance night every Thursday. No cover, cheap drinks, and sweet tunes.
Only thing is that the back room is a little hidden. I've talked to more than a few people at Fun Haus who didn't even know there was a back room!
The message board at ektoplazm.com has probably the most complete psy-trance event listing for the Toronto area and is worth checking out.
Also... BLA guys are throwing a party next Saturday (Feb 14th) bringing in Droidlock. It should be an awesome jam (it was last time he was in town anyway!) and I'm kicking myself for not being able to make it.
March 13th Eloko is throwing a party at Fun Haus bringing in Stellanutella from Holland and I'll be throwing down a birthday set there as well.