I think 'form' is the word Joe's after.

All this reminds me of 11 o'clock sung mass at St. Luke's. In thise days, the pubs opened at twelve sharp, and closed at two. So the real hard cases would hang out at the back of the church, and depart the moment they had legalistically 'heard' mass - the Pater Noster IIRC. Shortly before this the Agnus Dei was sung by a soprano with a ferocious wobble. My younger brother thought the words were 'aren't you staying', directed at the boozers who filed out shortly afterwards.