We (The West Yorkshire Fire & Rescue Service Band) were invited to provide musical entertainment for a formal officer's dinner at Regimental Headquarters in Pontefract. Full dress uniform all round so more shiny buttons than you could shake a stick at.
We were ushered into an anteroom and left to play a suitable accompaniment to the proceedings (ie all the British army marches in the book). Most of the time the doors to the banqueting hall were left open, but from time to time, presumeably when sensitive matters pertaining to national security were being discussed, the doors would be shut for a while.
Towards the end, somebody stuck their head through the door and invited our bandleader (an elderly lady whose name escapes me for the moment) to join high table for a glass of port.
On her return and scarcely containing herself, she related to us how she'd been warmly congratulated by the top brass on finding such a wealth of talent amongst the poor industrial communities of the area.
I vaguely remember getting a couple of beers out of it.