Wigwam (Finnish band)

Wigwam is a Finnish progressive rock band formed in 1968.
Background.
Wigwam was founded after the split of Blues Section. It was founded by Ronnie Österberg. He formed the band as a trio, but soon brought in British expatriate singer/songwriter Jim Pembroke (also in Blues Section) and organist Jukka Gustavson. A year later, Pekka Pohjola joined on bass. 
Their best known album was "Nuclear Nightclub".