All home groups in a church came together for 5 weeks of evangelism training. Don't groan- it's not about techniques, it's just holding out the goodness of the good news to stoke the fires of our love for Christ. At the end of the 5 weeks we hold an evangelistic dinner to which people invite friends and there's a talk. Those interested in Christ are invited to join the home groups.
For the next 5 weeks the home groups study material that goes over the previous 5 weeks but going a bit slower and with outsiders in mind. At some point (towards the end) each home group is tasked with holding their own little evangelistic dinner party where a speaker (to be provided) challenges them at closer quarters.
Therefore we teach, we do it with them, then we help them to do it themselves. Hopefully it becomes something they feel able to continue to do under their own steam.
Not hugely radical I know. Just trying to bring food, evangelism, community and discipleship together where they belong.