At the (small grass) airfield I'm based at I was in the clubhouse on a day when even the birds weren't flying (OVC <200', couldn't see the end of the runway) when a single-engined N-reg Piper appeared out of the murk, dropped off a couple of passengers, then flew out again. The pilot dodged booking-in. It was dropping off some pax who had been to a race meet. Looking at FR24 it seemed that it did this a lot. I've no doubt that the pax thought their pilot was the best there was, as he could transport them no matter what the weather.
He crashed a couple of months later (fortunately no pax on board, and he was OK) after an encounter with a hefty shower. I guess this sort of thing may well be common in horse-racing circles.