The Sunday golf (10:30 & 10:40am tee times), suggests a finish around 3pm depending on playing speed (18 holes is usually quoted at 4.5hrs). The gold course is next to the airport, so I expect that some of us we adjourn to the lounges at Tullamarine for drinks (This could be a challenge for locals with golf clubs, so someone will need to drive & pay airport parking fees).
I am still thinking about an alternative Sunday activity, but will need a volunteer to lead it. The target would be a similar finish time (between 4pm and 6pm), but it could be a little later if a bus trip is involved.
There will be a Sunday dinner for those still in Melbourne, but I expect that this would be smaller group.