https://youtu.be/E2q5PZqqZek?si=nV-_ESM3BT4dDTzK
https://m.youtube.com/watch?v=z2KglJSZGZE&pp=ygUWYW5jaWVudCB...
https://m.youtube.com/watch?v=PluzIW9LKSE&list=OLAK5uy_kqaRp...
And Daemonia Nymphe for example would a greek band, that tries to reproduce the spirit of ancient greek music (not 1:1 reconstruction, but with authentic instruments).
https://en.wikipedia.org/wiki/Daemonia_Nymphe
https://www.youtube.com/watch?v=JRxEXasEDj8
And I also can recommend crete. I camped wild next to an old temples there, which was otherwise occupied by goats. Interesting experience.
The performances are great, the venue (a courtyard of the Venetian castle) is cool, and the host is warm and welcoming — we had a really good experience.
Also, in Athens, outside the Roman Forum site, the Museum of Greek Folk Musical Instruments is really great, sometimes has performances, and the restaurants on that street are frequented by bouzouki players as well.