Is it possible for 5 large adults(very tall and on the heavy side) to sit in one of those cars? If so, would it be 2, 2 and 1...can it be 3, 2? If not, has anyone ever requested, or gotten a table instead, and still enjoyed the atmosphere?
Three adults may be pushing it on one of the car "benches". This past summer DW, DS5, and I sat in the back seat of a car. It wasn't too bad, but as I recall, I may have had my left leg outside of the car. Regardless, a great time was had by all.
My wife and I are on the large side. We made a reservation at SciFi. When we showed up and they took us to our table (car) we looked at it and left. There is not a lot of room between the back of the seat and the table in those cars. It would have been a miserable experience to be crammed in to the seat and have to eat. When we go to restaurants around home, we always as to sit at a table instead of a booth. They offered to sit us at a one of the picnic tables but we declined.
Instead we ended up going to House Of Blues for dinner and are so glad we did. We had a great time and the food was fantastic. We thank SciFi for allowing us to "discover" HOB.
They have 2 types of cars. Some have regular tables with chairs "inside" the car, so your group would be OK there. I think you can make a request when you call for your reservation.
I'm a big girl, but my mom & I shared a "back seat" at Sci-Fi with no problem.