Nightclubs in toronto?

I'll be having a 19th birthday celebration in Toronto and was wondering which clubs would be good for people of my age group. I've been to circa, this is london, and cabana all before and liked circa (but the weekend of my party there's a concert there) and this is london (though for This is London it was an all ages event and I hear that usually it tends to draw a slightly older and more sophisticated crowd). I was thinking of going to the Guvernment, but want to know if it's appropriate for my age group. By the way, my friends and I are cheap university students but like to go to a nice place once in a while. Basically I don't want to end up taking my friends to a place with older and really wealthy, trendy people but I do want it to be a club that is nice, and requires some dressing up. So if you could please suggest some clubs in toronto and describe what the scene is like. Thanks!