A Stewardship Development Program . The Parish Stewardship Committee. The more people who participate in the stewardship education, the more effective whatever method you chose will be.
Education is the key.
It is important that the dinner not be put on by members of the parish. No member of the congregation should be out in the kitchen working on the dinner. Have the dinner in a hotel or party location. A brief description . To use it in the midst of conflict might mean that each gathering becomes a complaint session.