My idea is to promote the Fun Day to all the churches ... operating Adventurer club or not.
If everyone abides by the above, with a little planning and luck,
all who attend should have something to do. If your club wants to
offer more classes, or sessions, etc ... by all means ... this will
make the day that much more enjoyable.
Very small clubs ( 1 or 2 children ) might be able to be integrated
into bigger clubs ( with the expectation that you might be able to
help out some ... ) so don't let size keep you from participating!