Now to make the Real Ale Brigade cringe.
One evening a long time ago a little Red Barrel appeared on the bar. Now the House Ale was Carrington's which was drunk under sufferance as APOs on National Service pay could not afford to drink G & T for all of the month. Anyway despite being charged a 1d premium a pint we decided to give it a go. However at about a quarter to ten the steward announced it had run out.
Now a young single staff pilot (it could even have been a member of these for fora) announced that he knew that "that silly barrel wouldn't last all evening".
Several months later Carringtons' donated 7 kegs to boost their flagging sales, these were consumed at some do foc and after that it was never drunk again.