Simon have you seen this topic on rebetiko-like poems? Κώστας Βλησίδης: Τα «βλάμικα» και «ρεμπέτικα» τραγούδια της λογιοσύνης
The topic of Seferis and his occasional contact with bouzouki music which he never liked, comes up again and again in the book “ο Ασιάτης Σεφέρης”, by Άκης Γαβριηλίδης. Gavriilidis concludes that Seferis who liked the rural traditions could never reconcile himself with the urban music of bouzouki.
Bouzouki is more universally embraced by the generation coming of age during the war and occupation, the generation of Theodorakis and Hadjidakis. There is a scene in the last novel of the trilogy Χρονικό μιας σταυροφορίας by Ρόδης Ρούφος where Athenian university students in resistance groups in North East Greece meet at some time after the liberation and before the full-on civil war, and one of them dances hasapiko.
The trilogy is probably not the greatest set of novels out there, more interesting for the politics it captures, and the shift of the author himself, from the anticommunism of the first book, the critical attitude towards the british liaison officers embedded in the resistance in the second book, to the disappointment with the nationalist leadership by the third book