The hot days of summer are a good time to organize a beach outing. Invite all your neighbors, friends and co-workers. A long day at the beach will give you plenty of time to witness of Jesus Christ, or at least to build some friendship bridges.
How about having a church service out in the beach, Jesus preached by the seashore and even out of a boat. Who says the service always has to be held in a building, Jesus preached mostly outdoors.