Eläkeläiset (Finnish for "pensioners") are a Finnish humppa band founded in 1993. They specialise in humppa and jenkka music and have been successful in Germany, Finland and elsewhere.
These are photos from concerts where Elakelaiset played, so they may be of other bands that played the concert as well.
System of a Down / Frank Turner / Amaranthe / Elakelaiset / Cheek / Ilari Johansson & Rudirok Aug 11, 2013 Mikkeli, South Savo, Finland Uploaded by Bruhvvmetal