Devil's Island by Mark Leveridge

This lightweight mental effect is suitable for close up, parlor or even stage and is very simple to do. A map is shown which has six named locations marked on it. A spectator mentally selects one and records his choice on a small card which is concealed in an envelope. Cards bearing the names of the six locations are shuffled by a spectator and placed by him entirely at random into six envelopes which are then given out to audience members. Despite all this, a prediction shown at the start leads to the correct person holding the envelope which contains the spectator's chosen island location.