You Don't Need Gimmicks, The Gospel is Good Enough

Just preach the Gospel! Jesus said "if I be lifted up, I will draw all men unto myself" so save the gimmicks for the traveling circus and the used car lots. If you win them with entertainment it will take entertainment to keep them. The bait and switch doesn't work in the secular world, what makes you think it will work in church? If you win them with the Gospel, Jesus will keep them. Just give them what they need and that is the Gospel of Jesus Christ.