Nicholas Athanasatos, 80, of Plaistow, N.H., died unexpectedly on Wednesday, Sept. 26, while on vacation in Greece. He was born on July 19, 1938 in Karavados Kefalonia, Greece and was the son of the late Panagis and Aikaterini Athanasatos. Athanasatos came to the Unites States in 1955. He was