demotika:

folk songs & dances from the islands & mainland. These cover a wide range of styles & rhythms from the simple 2 beat Syrtos, Balos & Kritikos through the triple time Tsamikos to the more complex Takonikos & Kalamatianos in 5 & 7 respectivley.

tsiftateli:

belly dances. These were probably brought into Greece with the enforced exodus of the Greek communities from Turkey in the 1920s. These have a pronounced Arabic flavour in rhythms & melodies.

laika:

modern popular songs. The best known of these in Britain are probably Never on Sunday, Zorba's Dance and The White Rose of Athens.

rebetika:

a dark & complex musical style that grew up in the cafes & hashish dens on the edge of the Greek criminal underwold of the period 1920-1940. The main proponents of this style styled themselves 'Manga'. They were usually misfits in society, often leading lives of petty crime & drug dealing. Rebetika extols the joys & hardships of the manga life. It ranges from slow, broody Hasapikos through fast ServoHasapikos to a wide range of 9/8 rhythms. These are usually slow, with the same emotional intensity as flamenco's Cante Jondo. There is also a medium tempo version that is often likened to the rhythm of a camel's walk. Or perhaps it is the way one walks after a long camel ride. There is also a very exciting fast 9/8 rhythm.