The British concept of queuing rarely applies in Greece, especially rural Greece where there’s very rarely any rush. Recently the bigger branches of banks and post offices have introduced the numbered ticket system, which seems to work quite well, but it can be a bit galling if you’ve been patiently waiting for a bus, only to be suddenly submerged in a scrum by a gaggle of Greek grannies with a surprising turn of speed and far too fearsome to be tackled – beware, the ‘all blacks’ always win! Just a Greek way of life.
The queue system does apply at e.g. Kefalonia airport and for car ferries, etc.