Hi Mona,
Welcome back to the Disney Parks Moms Panel and thank you for asking us another question!
Although I’ve never requested a specific room when I’ve been lucky enough to dine at
Be Our Guest Restaurant, I understand that you can always try to make a specific request when you check in for your dining reservation.
That being said, because the restaurant is extremely busy/popular, they may not be able to honour your request. I’ve dined in all 3 rooms and I love them all, so I’m sure you’ll have a magical dining experience, regardless of where you’re seated.
As for breakfast and lunch, which are counter service meals, all 3 rooms are usually open, though I’ve also heard that sometimes, one of the rooms (most often the library) is closed during the breakfast hours.
Have a Magical Day,
Lynne