Wen, if you are still checking in, I checked out KP VIP room for you. Very nice, enclosed and a/c. No problems party, overlooks beach but a way back and fairly formal. Another suggestion is upstairs at Lanai next door. They closed it early for party a couple of nights, and were set up with Eskies full of ice and it would be great with it's day beds and virtually overhanging the beach. More informal than the KP restaurant. Pantai also has some fairly private areas for party groups, although service is pretty slow there.
Hope this helps
Sue;~)