And also quite often people liked to include something foreign--there were a number of French, Spanish, Yiddish, Russian and Hebrew songs that were widely known and sung, as well as Balkan stuff, in languages to numerous to mention.

The same was true of folk dancing--in earlier days, you had circles, squares, set dances, with a Hora, a Kolo, and something Greek thrown in, and gradually, there got to be such a thing as "International", and it went from there.

I think there were good reasons that it happened--a lot of it had to do with the folk revival reawakening an interest in music, song, and dance within the communities of origin.

At one point, you had coffeehouse types singing something, and then suddenly, someone would come out of the woodwork who had grown up performing the music, and interest would grow from there.