I like the story about George Brown, probably apocryphal, when he was Foreign Secretary on a mission to Peru.
At a diplomatic reception the band struck up and George approached a figure clad in shimmering red and asked if he could have this dance.
The said figure replied, "No, I will not dance with you, for three reasons:
Firstly, you are drunk.
Secondly, this is not a waltz but the Peruvian national anthem.
Thirdly, I am the Cardinal Lord Archbishop of Lima."