Ring the Adelaide Arena. I'm sure that someone there should be able to give the attendance figure.
The actual capacity of the Arena has always been somewhat hard to pin down. When it was opened we were told it had a capacity of 8,000. Then a few years ago it was reported to be 7,800 and later still 7,600.
IIRC Game 3 of the 2002 GF series drew around 7,800, while Brett Maher's last home game attracted 8,200. The first 36ers game I attended, Game 1 of the 1994 Semis against the Tigers, had a reported attendance of 8,000.
What is the actual capacity of the place?
The 36ers website says that it "holds up to around 7,800 fans in courtside boxes, standard seating and elevated corporate suites." While the Basketball SA site says 8,000.