Wednesday nights, about once a month (check fulllock.com for dates) at Calder park. Track is open from 6 til about 930 then they run a little top 8 comp 930-10. Be there beforehand to get scrutineered before 6.
Scrutineering is not super harsh. Brake lights must work, nothing loose in car, battery bolted down, nothing leaking too much oil/water. SOmetimes socks on PS resevoir and metal valve caps.
Costs $80 to drive $10 to spectate. Attach the sticker to any drift damage or if there is none then attach on the windscreen directly in front of driver until drift damage occurs.
Night consists of basically a free for all through most of the night. They line you up at a certain point and let you go about 20secs apart. Do a lap and return to the back of the queue. You get PLENTY of track time.
[EDIT - Also need wrist to ankle non-synthetic clothing and a helmet, though you can hire a helmet there for $20 if you forget to pack one]