The German lederhosen are remarkably similar to the outfits worn by Morris dancers.
No the dance I saw before, I am pretty sure in the German trip of the movie European vacation. They did wear lederhosen in it.
The clothing and beards reminds me of Amish people.
A google search suggested it could soon be extinct so I guess I am not the only one who is not a fan. Maybe it will be resigned to Oktoberfest activities like the Chicken dance.