Nektarios,
I am sorry for the ignorant reply, even though thats not what I intended.
Most new-calendar Greek churches in my area do not have Vespers because nobody shows up. In addition, they almost never have Orthos ( I only know of one that does) and ALWAYS skip the liturgy of the Catechumens. All night vigils are completly unknown, even on PASCHA!
As for confession and communion: When I was still in the OCA some years ago, I visited St. Athanasios. After the service everyone gathered in the gym for snacks. I was talking to a woman who I asked a question about confession. This big look of shock came over her, I will never forget it - it was as if I was an alien, she said: "Confession, are you Roman Catholic?" !!
The GENUINE Greek practice is Vespers the evening before any Liturgy. Confession as often as your conscience demands but at least once every 40 days (AT LEAST). Commune often as you are able, at LEAST once every 40 days, or every week if you can. But always with the blessing of the priest.
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Peter, do you mean the Ninth Hour before Vespers?