https://thelondonkaraoke.com.au/

Was here last thursday with some friends. Not sure if we got special pricing as my mate was a regular and it was his birthday, but for7hours we paid close to $5k for 6 girls and the room.
I believe its like $200/hr for room, and $100/hr for the girl. They gave us some free drinks and gifts.

Very nice and playful korean girls. Service there is really good. Would recommend if this is your thing.