For breakfast and lunch solarium bistro has become basically a small windjammer. Years ago, they served healthier options, but more recently we find the breakfast and lunch hot items are often the same as the windjammer buffet. Open seating.
Dinner is more like a Mediterranean tapas restaurant/ buffet. They seat you.
I believe they like you to reserve a reservation for dinner, although we have done a walk in and we’re seated.
m