We used to do something very similar at Mountain Lakes Sailing Association in New Jersey when I was a member there. We called it the "night race" and it marked the end of the season. Awards were given for best illuminated boats as well as actual winners of the races.
I think @Der_Dude is trying to help us. Somehow his musical clues are meant to lead us to the name or location of the yacht club with its event in the dark for junior sailors. Along the way I learned that Argentinian tango dancing has a strong following in Finland.Having a hard time figuring out what dancing in Buenos Aires has to do with sailing in Finland at night.