The church I'm part of runs a number of 'community-facing' programs. One of them is Mainly Music, and there are a few children's Sunday programs that also attract some non-members. Mainly Music has lots of participants from outside our congregations.
These groups give a contact point with adults who might not be in the church circle.
This morning, our Christmas 'Celebration' included gifts for children moving from one Sunday group to another (as they grow), and a big contribution from Mainly Music children. Many of their parents and some grandparents came along.
Then we had a brunch for no charge.
More opportunity for chatting, getting to know and building a brand...as marketeers might say.
A great example of a customer involvement chain.