N.N.O is a National event and held the first tuesday in August, They are a good time for everyone who attends. Some of the events have various games for the kids, The Sheriffs Office sends a deputy down to hang out and be with the people, answer questions if needed and hand out goodies, Most of them are held on blocks at someones house or a street, st Marys averages about 20 differant neighborhoods. Plus you get out and meet neighbors, and yes it is advised to lock the doors.