Teacher Discussion Forums

Isn't this interesting?
I don't know what kind of shoes they are.
But I sure hear sounds produced by girls'
footwear, especially in such public spaces
like train stations.
Such girls who wear such shoes and produce
castanet sounds are called 'castanet girls'.
Have you heard the term or similar terms?
BTW, what do you call such shoes? It seems
they are called 'mules' in this country.
Thank you.