Because some Finnish people find it enjoyable.
I have found some information, and think this could be the answer: The tango is a very popular dance in Finland today, but the foxtrot is the dance you'll see the most in Finnish clubs.
It originated in Scotland and Finland in 1873
People who live in Finland are Finnish and are referred to as Finns.
People from Finland are of Finnish nationality.
Finnish or Finns
Polska is most popular in Sweden, Finland, Norway and Denmark. There are a few variations between the countries on the dance but it is known for being a partner dance.
People from Finland are called Finns, or Finnish people.
The population in Finland is about 5.3 million people.
Most were born in Finland but Finland has taken in some immigrants.
League of the Rural People of Finland was created in 1906.
Swedish People's Party of Finland was created in 1906.
On with the Dance - 1920 was released on: USA: 15 February 1920 UK: 18 April 1921 Finland: 18 March 1923