We had a reservation for 6 for just two of us today. This morning there was still two lunch reservations for parties of 6, but not parties of 1-5. When we checked in and told the cm we were only 2 and admitted there were no missing people, the cm said good for us, that he secretly recommends smaller parties book for a larger number since there are very few reservations for smaller parties and current protocols means it makes no difference whether you are 1 or 6 or inbetween.
We were seated in a back car for four as it turns out. Every other row is unused and in the rows in use, every other car. It was very quiet, which was fine with me. The vegan oreo milkshake is amazing btw.