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:

Church Safety 101 Checklist
Guidelines for Ministry Workers
Safety 101: A Church Leader's Guide to Risk Management
Lending Your Church Facilities: Guidelines
Protecting Your Ministry's Traveler's