I have no info on what effect the licensing changes had, but I can vouch that Newcastle could be genuinely scary on a Saturday night. You haven't lived until you've hidden under a table while pint glass missiles hurtle overhead around a revolving dance floor on a boat on the Tyne.
I think that's the other Newcastle. This one is north of Sydney (I guess they are both north of Sydney, but there's a bit of a hike to the one on the Tyne...)