If you don't already subscribe to Discipleship Journal, I highly recommend it. Here is an idea from the latest issue: "Grace After Dinner"
The concept is simply to invite non-Christian friends to your place for dinner - GRACE stands for G-good food, R-relaxed atmosphere, A-answers to questions about Jesus, C-Christ's plan of salvation explained, E-experience the difference that Jesus can make in your life.
Any similar ideas??