Sol does have an office, but for his part that seems a bit disconcertingly official for the conversation he and Sebastian need to have; he arranges to meet him outside in the garden that's coming along. If it gets awkward, they won't have a shortage of work in front of them to busy their hands with, and he's in the habit of not smoking indoors, thanks to parenthood.

He's there (lit cigarette in hand) when Sebastian arrives to meet him.