"in the cabarets, a new genre of entertainment—the Jewish joke, monologue or sketch known as szmonces—rose to prominence. The szmonces, inevitably characterized by a more or less subtle ''żydłaczenie'', at its best turned the pretentious Jewish assimilator or the harried Jewish tradesman into universally accessible symbols of the dislocations of modern life; at its worst, it became vulgar antisemitic caricature. The performer Kazimierz Krukowski (1902–1984), known as Lopek, was among those acclaimed as a specialist in the genre."〔http://www.yivoencyclopedia.org/article.aspx/Theater/Polish_Theater | YIVO encyclopedia of Jews in Eastern Europe〕