Thanks, Ina.

Would you believe Google gives 26,800 hits on "RUCKI ZUCKI"? And 72 hits on "Rucki Zucki, das ist der neuste Tanz"? You can even download ringtones for your cellphone with that tune. You wouldn't believe how much time I spent searching for this song without stumbling on, or thinking of, that spelling.

Google let me down this time. When you search with a misspelled word, even if it's an obscure foreign word or proper name, Google nowadays often asks, "Did you mean——?" and suggests the correct spelling. It didn't do that this time. Neither did Allmusic.com, which is normally very good about finding names or titles with spellings similar to what you search for.

Now that I know the correct spelling, I see that Allmusic.com lists only one recording: Ernst Neger performs RUCKI ZUCKI on the album "Die Grosse Stimmungsparade Mit Ernst Neger," 1990.

You can see a track list and hear sound samples at Sony-BMG/Germany.

Here's an article about Ernst Neger in the German edition of Wikipedia. (The English edition doesn't have anything.)

Apparently there is a French disco (?) version recorded by Les Touristes. It contains the phrase "Rucki-zucki, On chante, on danse, on rit."