Although we can't or likely won't confirm it w/ the OP, I don't think this one is ambiguous...
>>> guy dressed in a fancy suit = is Bill Murray
>>>hes drinking water I think = probably whiskey, but yes, he's drinking
>>> this old guy appears next to him and he's all grey and withered = John Forsythe as the Jacob Marley character
>>> hes some kinda ghost. and hes wearing sunglasses = this is really what seals it, plus the next bit
>>> he takes the water and drinks it, but all the water leaks out of him cuz apparently hes full of holes. = again it's whiskey, but per the youtube link above and these photos, I think we can confirm this is SCROOGED.
http://2.bp.blogspot.com/_o3y7HpOHug8/Sze5LYSjEmI/AAAAAAAABc0/t1an02My8Ho/s400/scrooged+00.jpghttp://www.americas-most-haunted.com/wp-content/uploads/2015/11/ghost.jpg