I am just having an opportunity to read the 2016 Barna Report produced in partnership with Cornerstone Knowledge Network entitled More Than Multisite: Inside Today's Methods and Models for Launching New Congregations. I will likely post several times about it.
One term I have already learned that I like very much is "Location Partners". I am going to use it here forward as a replacement for "Nesting Congregations". Location Partners are defined in the report as "a separate congregation meeting at, and sharing resources with, another church (for example, a ministry reaching a specific demographic groups, such as a young adult congregation or an international group with services in a different language)." [p. 10]
The only thing I would change is to indicate that Location Partners can be several congregations sharing facilities and other resources. I have visited church sites where up to six congregations meet for worship, discipleship, fellowship, and other activities.
I also like Location Partners as a title as Nesting Congregations as a term has implied in many cases a parent/child relationship. Location Partners should express more of an adult/adult relationship. For some churches who own their facilities, however, this is a stretch when a group of a different ethnicity or socio-economics is their Location Partner. Perhaps some growth in relationships can happen in this case.