All age?
One of the issues churches or rather youth leaders often raise is that of the connection between youth ministry and the "main" church. (I've mentioned this in various ways before).
Can we create an intergenerational community yet be missional and relevant (emerging)?
I did once joke that certain jazz may hold the key as it seems to be having a wide appeal (witnessed in the huge numbers at Ealing Jazz festival in my home town - or maybe they just go to sit and drink in the park?). A colleague more seriously said that food and stories may be the answer.
Body Beautiful by Philip Mounstephen and Kelly Martin is a helpful place to start with this issue.
It raises some interesting areas and being a Grove book is a short, quick read.
A brief quote:
"At best church life seems like that of dysfunctional family...the call of the church is to model reconciled community not as a displacement activity to avoid the real task of mission but because reconciliation lies at the very heart of mission".

Some of the advocates of "home church" also say interesting things -like during the sermon on the mount did Jesus send the children off to junior church because it was a long talk?
Can all age church be a reality without the dreadful spectre of naff family services?