Had the same conversation with my Daughters on a recent long drive:
My experience of the RAF's Friday drinking was this:
Pub at 1200
Out by 1500
Sweep & Sign-Up 'til 1600 (ish)
Home.
I did that more or less for four years 'til my Fitters Course.
Posted to RAFG in the v. early 80s: I went for a 2200 Duty Evening meal and was taken to the Naafi instead where we quaffed three pints each...when I got back to work - I found I couldn't!
I haven't done that since.
...well, not when at work!
Cheers!
Rigga