My experience is also that Sanaa will not seat parties of 2 (or solo guests) at a window seat even if you have an ADR for opening at either lunch or dinner or politely ask or politely offer to wait. They are 4 tops and Sanaa intends to seat parties of 3 or 4 at those tables. I have seen window seats sit empty for the entire length of my meal as I ate at my 2 top deeper in the restaurant. I have also watched parties of 2 get up from their 2 top tables after placing their order and carry their drinks to an empty 4 top window seat (much to the consternation of the waiters). Sanaa is a beautiful restaurant with quality food regardless of whether you get a coveted window seat or not. And if you have an ADR for dusk or later, you can't see much anyway. If you are a party of 2 or solo guest, pls don't get your hopes up for a window seat.