Yeah Tent city in the western parklands is free and totally goes off at night (dont go there).
Avoid Hindley st like the plague and you'll be alright. For entertainment, we have 2 big silver balls in rundle mall and metal cops which for some chromed out politician constitutes as art... but in all seriousness theres the same stuff here to do as other places, nice beaches, decent wineries in the valley, a nice freeway that cuts thru the southeastern hills... loads of wild restaurants..
I'd highly recommend travelling to the east coast of victoria and then driving thru mount hotham, bright, myrtleford, wangaratta, echuca, mildura, berri and then down past truro into adelaide. would be a nice varied drive, with loads of twisties around mt hotham.. i could almost write a food tour rally but i forget the names of all the kick arse country bakeries in country victoria... mmm venison pies
-D