The Seatbelt seat is the only seat that doesn't have a safety bar. It is the middle seat in the 3rd row where you can put your legs in the isle. Look for it the next time you go.
When I make my solo visits to WDW, there's always someone to talk to - standing on lines, sitting on benches watching the crowds pass by, etc. I always offer to take family pictures, too - it's great!