Organizations may ask to use your facilities. Being a good neighbor suggests you should be open to helping people. Being a good steward suggests you take steps to avoid paying a claim arising from an activity your church didn't sponsor. This whitepaper discusses such topics as:

Preparing for the Unthinkable: Violence in the Church
Multi-Purpose Rooms: Maximizing Your Space
Tim Cool of Cool Solutions Group Initiates Facilities Management Contract with Elevation Church Campuses in Charlotte, North Carolina
Good to Great Church Planting: Accelerating Growth and Effectiveness in Church Planting
Scheduling Solutions Made Easier for Churches