I used to go to a sometimes rough sounding session in a town centre pub that did most of its trade at lunchtime and early evening. By the time the session started there was usually only a handful of people there.

On another evening, when I and a mate where the only people there at 10.15, I asked if the session players bought enough beer to pay for their seats. He said 'Not always, but it livens the place up and no-one comes into an empty pub'.

We left and found he had already dropped the catch on the pub door.