Originally, there were only eight seats in this private room, but now there were ten people including Freya and Connor.
Laura had asked the waiter to add an extra chair for Freya, but no one had added a seat for Connor.
On top of that, the space in the private room was not very big to begin with, so even if they wanted to add more chairs, they could not.
The private rooms in Lume had a minimum cost. When Shane booked the private room, he had specially chosen a smaller private room so that the minimum cost would be lower.
Normally, this private room could only accommodate eight people. However, when Laura saw that her daughter did not have a seat, she asked the waiter to add an extra seat.
However, if they wanted to add another seat, the entire private room would seem a little crowded, so they'd selectively ignored Connor's existence.