This video from the Winter Olympics in Canada says about itself:
Dutch speed skating band Kleintje Pils during the Men’s 500m in Vancouver 2010.
Translated from NOS TV in the Netherlands:
Musical protest by Kleintje Pils
Saturday, February 15, 2014 15:21
The Dutch brass band Kleintje Pils ["Small Beer"] has played the song YMCA in Sochi during a break while the ice was cleaned during the 1,500 meter speed skating. This was intended as a protest against the anti-LGBTQ law in Russia.
“We too know the terrible images of anti-gay hatred in Russia and other countries,” said the Oompah band. “We cannot be silent about that.” The song, a 1970s hit by the Village People, is associated with the gay movement.
Kleintje Pils has had contact with Victor Willis, the composer of YMCA. “He wrote it to connect people with each other and that is also what Kleintje Pils stands for,” says the band.
A Dutch radio interview with the band about this is here.