but you are not ,you are only doing it for yourselves when you are playing at home with no audience,or with invited friends the publican only wants you there to sell his beer, if his customers had not liked what you were doing, he would have told you to go, those people were coming to the pub because you were entertaining them, those people would not have come to the pub otherwise or stayed so l0ng without the entertainment. free beer is a form of payment , if you were going down like a lead balloon ,you would be out.. on your way home