I am so sorry but I don't know of any actual pool halls on the Big Island anymore:sorry:
Back in the late 90's Kelly Oyama (used to be a WPBA Touring Pro owned a hall there) but after it closed I never heard of any other pool halls opening. Sad really, they used to have a pretty good amount of players from there that used to come to Oahu for the Aloha Open every year - don't know what happened to all those players.
The golf is good at Waikaloa though! I used to play for the Oahu Jr. Golf Association and the season-ending tournament was always held there. Have a great vacation!