Use the Consulate's virtual assistant on the bottom right: www.mfa.gr/newyork Ask the question and a list of options in the form of a word doc will appear
As soon as you arrive at the Greek Consulate in NY you are required to ring the door bell (hence covid19...) and the person who will open the door will inform you of the location. It is near by within walking distance. They expect you to take the pictures at that particular location since American passport pictures are not the proper once for a Greek passport.
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