I remember back in the day when on Grand Final Day, the first match was the men's Reserve Grade Grand Final, followed by the First Grade. There were a couple of years in which the Grand Finalists in both grades were from the same club, and some clubs won both grades. In those times, during the competition season, there were three games played by teams representing each club. In other words, St George would be at home to, say, South Sydney. No other clubs playing on the same ground that day, and the games would be played at the home ground of the 'at home' team. Those grounds were rough and tumble suburban grounds. I suppose someting similar occured in the southern States.