Evangelism and the Front Porch

Ryan and I are in the process of buying a house, and I am really excited about the prospect of getting a front porch. I've never had a front porch, but I always enjoyed sitting on the swing of the front porch of my grandmother's house.

Joseph Myers has a great post on front porches here. I totally agree with his front porch vs. back deck view of our contemporary evangelistic practices. How do we do front porch kind of evangelism? Do our evangelism efforts require someone to have made it to our back deck? Or do we allow them to peer into the windows of our faith from the front porch?