"Seven drunken nights" is tremendously well known and popular in Germany and I know at least two German versions and parodies. In fact the English language version that I sing is taken from a popular German song book, which I can no longer locate, and has pretty crude verses for Saturday and Sunday. I generally sing this song unaccompanied in order to sing it with "actions" and I really ham it up. The actions for Sunday are pretty lewd but are in the main are accepted at least in my circle of friends.
Whilst in the Idle Fellows, Wilfried Drygala would sing the lead and he modelled himself on one of the Dubliners versions and just as they, he piously and absolutely refused to sing Saturday and Sunday much to the disgust of Brian Kelly and myself.
I also know some tame, but probably the original, English and American versions which can be found in the various Cecil Sharpe collections. I have also found amusing Irish versions in Internet whereby the Sunday punch-line extracts the urine concerning English taxmen.
My source, however is an unexpurgated 7-verse version given in, the German surprisingly (or not) in Lieder, Songs und Gospels 3

Lyrics