Reminiscent of the p*** up on the coach in 'Magical Mystery Tour'!
Didn't Paul once or twice, at the height of Beatles' fame, go into pubs in the middle of nowhere and start playing the piano, or is that just an urban myth?
Round our way, Rod Stewart was known to frequent the local pubs (I always missed him) and apparently he'd chat, sign things, and on leaving always instruct the landlord to get everyone in the pub the 'same again' on him.
So my mate says, anyway!