As Premy said though, at the end of the day if they're using all their money one way or the other on improvements and maintenance, programs, whatever - then subsidising rego with canteen income is only taking money away from these areas.
From memory Suburb have a pretty good setup club wise and no trouble with numbers, so it doesn't seem like there's too many issues with what they are charging to register and I suspect they aren't too worried about it either.