backyard grapevine

we inherited this grapevine when we moved into our home. I know very little about the different varieties of grapes that can be grown so I did a quick search. one thing I was surprised to learn is that you can make red wine out of green grapes, like the ones pictured here. I have never used the grapes in our backyard for anything. I do notice when I am cleaning them up off of the grass and walkway they have a vinegar type of smell. my husband actually ate a few and said they were very sour. despite his distaste for them, he takes care of this amazing vine & I would venture to say we easily yield twenty five pounds of grapes from this old beauty every summer. I wonder if anyone on long island actually makes something out of the grapes they have in their backyard.