Close-Up: Austria's teenage ballroom dancers
This BBC News series focuses on aspects of life in countries and cities around the world. What may seem ordinary and familiar to the people who live there can be surprising to those who do not.
Ballroom dancing has become more popular in recent years because of shows like Strictly Come Dancing - but in Austria, waltzing has never gone out of fashion.
Every year around 300 balls take place in Vienna - from the glittering Opera Ball, to the Ball of the Fire Brigade.
As a result it is still a rite of passage for Austrian teenagers to learn how to ballroom dance.
Bethany Bell went to a class in Vienna to find out why it remains so popular - and spoke to some teenagers as well as dancing school owner Thomas Schaefer-Elmayer.