Ask him to visit the Local Kingdom Hall. Why? Because Witnesses are notorious for ignoring-violating fire laws and public building codes for the special use buildings they use.
Things to look for:
Ingress/Egress Issues......doors and windows in the right places and the correct size..... and special "panic hardware" that always allows exit in a hurry.
Handicap issues..... accesability issues
Fire equipment..... commerical fire alarms, extiguishers etc. Does the building have the right stuff for it's size and occupants? Rated doors? Wall construction?
Materials... many residential materials are not suitable for commercial buildings... they end up in Kingdom Halls as they are cheaper to buy.
~Hill