There are a couple of training days on the concept:
5 July – Cairns Road Baptist Church, Bristol
4 October – Christchurch, Welwyn Garden City
and the website is here.
It's slightly confusing having an organisation called 'cafe church', whilst several churches (including ours) do 'cafe style church' without being part of the organisation. cafechurch.net is about Christian communities based in coffee shops, rather than church services set out around tables in cafe style. Hope that clears it up, but it probably doesn't.
(We're in the interesting position of having a local cafe, but a cafe service that's too big to fit into it....)