Chapel

1. a small building or room used for Christian worship in a school, prison, hospital, or large private house.

   a service in the chapel

2. the members or branch of a print or newspaper trade union at a particular place of work.

   Mr Brind was the head of the BBC's NUJ chapel

1. belonging to or regularly attending a Nonconformist chapel.

   staunch chapel folk

Middle English: from Old French chapele, from medieval Latin cappella, diminutive of cappa ‘cap or cape’ (the first chapel being a sanctuary in which St Martin's cloak was preserved).