Many churches have rehersals and meetings during the day on Saturdays (choirs, ushers, etc.) Contact your minister and inquire about using the tables in Fellowship Hall, Kitchen, Conference Room (whereever there are tables)during these rehersals. Our church does it all the time for various member activities. The only requirement is that they leave the area exactly as they found it. There is no expense to the church and they would be providing a help to members of the congregation. A token donation to the benevolent fund or a Biblical themed wall hanging would be a nice gesture.