I haven't gone to the Fifth for a while but it is one of the longstanding nightclubs in Toronto. It has managed to outlast every club I have gone to since I moved downtown in 2004.
Good music, cheap drinks before 12 and always a decent crowd. I have never gotten into any altercations here with obnoxious drunk people and generally the crowd is far more together than at most places - 19 or not. The line up is totally worth the wait. Now I kinda want to go back and soon!