I called the Hilton direct and asked for the Liu Family Reunion rate, and I was told it is all sold out! >:

She said she would mark our record that we are with the group, though, and if a room "comes available" we can get the rate. She said we can ask about it when we check in. It's not a big deal, though, as the internet rate we got is $66 a night.

I guess there's no such thing as a lower rate for more people booking, if they are limiting the number of rooms they will book at that rate.