The Piper Aztec can seat up to 4-6 passengers very comfortably.
https://centraljetcharter.com/piper-aztec.html "Piper Aztec Airplane, Information!" When Cessna would come out with a new model, the other two members of GA's Big Three would develop a model that would carry more, go faster, go farther or whatever. Case in point: when Cessna upgraded its 310, Piper countered by adding a fifth seat and bigger engines to its Apache, thus creating the PA-23-250 Aztec. The first really big change came about in 1962, when Piper introduced the Aztec B. With its longer nose and bigger cabin—now with room for a sixth seat—the B model ushered in the big, brawny, beefy Aztec look that everyone is familiar with today. Two years later, Piper again enhanced the model's appearance and performance and brought out the Aztec C. Produced between 1964 and 1968 and featuring streamlined engine nacelles, it was by far the most popular of the Aztecs. Standard equipment on Aztec C airplanes included fiberglass gear doors, fuel injecti...