The picture would be difficult to do a proper "from left to right" identity name check, so I opted for a second image with numbers to make the ID easy.
I can name 3 for starters...
#2 is Grant Roberts with the guitar, who kept his musical side going, playing in local clubby bands in later years.
#26 is Ralph Milne, yep the same one as yesterday. Dundee United superstar and gambler!
#27 is Craig Methven, who ten years later would be fronting the Scrotum Poles.
And what cheery tune do you think the Douglas troupe chose to play for the pensioners to sing along to?
Well it was one of the chart hits from back then - McGuinness Flint's "When I'm Dead And Gone"...!!
Big thanks to Craig