If you bought the lounge plan with 4 seats up front and the sofa with 3 seats with seat belts I would say 7 legally. The side ottoman seat with seat belt may be a mistake since it is not legal to travel sideways in a lot of jurisdictions. I'm not familiar with California in that regard. I don't recall a seat belt anyway. Underway, seven. Stationary, eight. Realistically, six since the center sofa seat is kind of an odd man out seat, IMO. However, we have used the center sofa seat for a child seat. The sofa is a bouncy ride, BTW being cantilevered back of the rear wheels. The two main roads down Napa Valley are not that bad to drive on. You could live with it, especially after a few stops.