Two or three rooms, with maybe 3 or 4 people in a room.
Australia /NZ have a timezone problem as well, depending where you are situated, and if Daylight Savings is in operation, as New Zealand is right on the international timezone boarder at GMT +12, and Perth in western Australia is at GMT +8 and Sydney is GMT +10.
Five hours difference can mean that somebody in NZ will be wanting to go to bed when somebody in W.A. is just coming online, which make it pretty hard to organize anything on a semi regular basis at a time that suits all.

I think most in out timezone basically give up and try to get a race wherever, even though the lag can be horrendous, because waiting around to get a race on the AUS server is just a waste of time for the most part.