We have a group of guys that pull a rotating security detail. There are enough so that it only comes around once every 2 months. While having a CCW is not required many of us do. We also carry weather we are pulling security or not. We don't advertise but know each other and pull it two guys at a time. There are some people that have made themselves unwelcome at our church (usually it's a problem with inappropriate conduct around children) and we have their pictures so we recognize them and are to call the police and make sure they leave the property. It's not a real formal thing and we also have pagers that are carried by those on duty.