I remember playing out in the sticks at a local village pub several years ago, we played classic rock covers and always went down very well with the punters.
At the time I think our fee was £200, when we finished playing our last set the punters were calling out for more, we obliged and played a couple of extra songs, after these they were still calling for more and specifically wanted us to play Black Dog again, the landlord said if we played it, he would pass a glass around.
When we were packing away our gear, the landlord paid us our £200 plus the contents of the glass which amounted to £50, that’s the most we ever got paid for one song.