A complete and utter wate of money, if you ask me! (I think the East Lounge is what used to be the Etihad lounge, right? I've not been in there since it was the Etihad lounge, but really, I think you're being very flaithiúlach to be throwing down that much money for an entire family, considering what you'll actually get for the money)

I would advise you to save that cost and instead take the family out to dinner when you arrive home.