Of course, there's always the childrans' wassail song with the chorus

Knock on the knocker, ring on the bell
Please give us a copper because we sang so well

with the usual verses about not being daily beggars etc. I'm surprised this isn't in DT. Laurie Lee quotes from it in "Cider With Rosie".

Eight of us set out that night. There was Sixpence the Tanner, who had never sung in his life (he just worked his mouth in church); The brothers Horace and Boney, who were always fighting everybody and always getting the worst of it; Clergy Green, the preaching maniac; Walt the bully, and my two brothers. As we went down the lane, other boys, from other villages, were already about the hills, bawling 'Kingwensluch', and shouting through keyholes 'Knock on the knocker! Ring at the Bell! Give us a penny for singing so well!' They weren't an approved charity as we were, the Choir; but competition was in the air.

:-)