sho gudji wado de suka

54 years ago I worked with a man who has been a POW in Japan. This phrase is probably NOT spelled correctly but thats "the sounds". In the past 54 years I have forgotten what he said it meant.
I have found others of his phrases "had lost something" from 1945 to 1962 (and no doubt from 1962 to 2016) LOL

arigato

It is a kind of puzzle.

But with full imagination, it might be
Sho ku ji wa do de desuka?

Shokuji means meal like dinner.
wa is added at the end of subject word.
dodesuka means "How about?"

So it might be
"How about meal?"
Probably he want to say,
"How about taking a meal?" or
"How about your having meal?"

Just reading aloud the phrase you wrote out, the closest thing I could come up with was the same as the earlier poster:
"shokuji wa dou desu ka?" which can mean, depending on the situation, "how is the meal?" (referring to the meal you are having), or "how about going for a meal?" (inviting you to go with him to a meal). Does that possibly fit into the situation you heard it?