From memory, cursing was not totally banned, but it wasn't encouraged due to the make up of the audience which included quite a few children and older folk.
Had to laugh at Guest RA's reference to Hamish Imlach…..Hamish had quite a few parodies to the Black velvet Band, specially for Dunoon and the American base
"Her eyes they shone like diamonds,
Her neck it was just like a swan
And her "baubles" hung over her shoulders,
Held up by a big darkie's haun.

The arrangement of swan and the Glasgow "haun" was brilliant.