Not really sure about the night life in melb. Crown is about the only place I've been. Was pretty good, would go back again (may still have the indoor laser skirmish still). Espy is good, has some good music there some nights.
Otherwise there's plenty of things to do during the day, depending on what you like. The aquarium, zoo, shopping.
otherwise, you'd have to go to a real place... like check out Bacchus Marsh, or Ballarat... or even Geelong!! hahahahaha