Rembetika music is the music of the Greek Underground. It originated in the hashish dens of Pireaus and Thessaloniki around the turn of the 20th century and was influenced by oriental elements that came with the forced immigration of 2 million Greek refug
From the 1950s in Smyrna and Istanbul and working class/poor Athens, Piraeus, and Thessaloniki, to it's 1922 spread on the Greek mainland, to its height between WWI and WWII...