Depends what sort of night your after really
Nighclubs are:
Bakoo, G's, or motion or whatever its changed its name to this week, all of them pretty much full of very young teeny boppers
barabazzas - nightclub/bar for the non-teeny boppers, usually very busy at the weekends
Busy Pubs are:
Johnny foxes - very mixed crowd, always busy
cactus jacks - young crowd, always busy, dancers on the bar of usually questionable atteactiveness
Osbournes, usually busy at weekend, younger crowd
Hootananny's - mixed crowd, usually good for live music
Weatherspoons - cheap booze, no music, airport loung style
The room - havent been in for a while but last time i was in it was very busy, mixed crowd
Pivo - mixed crowd, not usually that busy
Loads of other pubs about town that can get busy depending on how close it is to pay weekend, if there is anything decent on, i.e big footy game/decent gig on town and if its a full moon! ha ha