A few of us were rather inebriated and singing that in a Transport Caff near RAF Ternhill at about 0200 one night in 1969 and we got flung out. Not many people have been ejected from a Transport Caff.....
Ah! the Ternhill greasy spoon! Not long after your experience - in January 1970 to be precise - following the Mess Burns Night, a number of us at a similar hour went to said Caff.
All in DJs and long dresses (as appropriate!), and led by a large Scotsman, resplendant in his North British Jocks in Frocks evening dress, topped off by his St Andrews Uni academic gown - which was a tasteful shade of scarlet!
The local rockers went kind of quiet, one commenting "Are you lot for real?"
But we didn't get thrown out (but I don't recall any singing!) and said large Scot eventually retired as a 2-star.
[Lucky in retrospect we weren't singing, our favourite at the time was the 1969 Christmas No 1, slightly modified - RN/FAA influence? - to "Two Smally Boys!"]