The New School has - or at least had - a class in food styling, that covered photography, lighting, etc. I think you could take it on a continuing ed (non degree) basis.
Have you investigated the offerings at ICE -- Institute for Culinary Education on 23rd Street? I'm fairly sure they offer food photography and styling classes at least from time to time.
I am not sure if Nicole Franzen gives classes, but she may be able to point you in the right direction. She is based in NYC.
http://nicolefranzen.blogspot.com/
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http://nicolefranzen.blogspot.com/