The idea of 'seeker services' is not new: it was there in apostolic times, according to Michael Green (Evangelism Through the Local Church). Neighbourhood 'coffee 'n dessert' nights, friendship services, Alpha Courses, Christianity Explained courses - these and many other tools are available for us as a church to reach out to those the New Testament calls 'the lost'.
But the very best means of evangelism has always been the integrity of the Christian's character. 'Preach the Gospel: use words if necessary' said Francis of Assisi. But words are important too. (What use is a signpost without words?).