Don's Party, originally a play by David Williamson, is set around election night in 1969 where a group of friends gather at Don's house hopefully to celebrate the defeat of the Liberal government after decades in power. The play was set in Melbourne but when the movie was shot in 1976 it was set in Sydney. The filming location was the, then up-and-coming, suburb of Westleigh.
This is a simple mystery. You have to get to Don's Party but you don't have an invitation. Your job is to find the location of the party or where it was filmed (street address). Once you have found out where go to that address. Stand in the street outside the party venue and get your instructions for the location of your invitation.
Look for these numbers: ABCA and DEFGF. Your invitation is located at: S33 43.EAD E151 03.C00
You can't get simpler than that!
Cooley: I wouldn't like to be in your shoes if you hit me. I'll sue you for assault. I'm a lawyer.
Evan: I'm gonna smash your b***y teeth in.
Don Henderson: He's a dentist!