balja:
How about giving a notice at the tournament site. Just a while ( maybe an hour) before closing down. It`s annoying to be interupted in the middle of a game!!
I am not quite sure what you mean by the tournament site, but on the game client it has a small warning at the top of the page that maintenance will commence at XX:XX time, usually denoting one hour.
Therefore I know if I have time to play 9 or 18 holes within seconds. I know I can comfortably play 9 holes in 20 minutes. The downside is I will not start a multi-player game.