Okay. Say that the plane is a 737. There is 6 abrest seating. Wouldn't it be a great idea if passengers could convert any three seats on one side (again 6 abrest, 3 a side) into two seats? This is how it works:
1. The armrests would fold up and be cloth on one side so it would fill in the missing gaps in the seat.
2. Then, there would be a first-class style armrest that pops out of the middle seat.
3. Three seats would be turned into two larger ones.
4. If the middle seat was empty, the other passenger could fold it up so he could have more room!
I have a drawing of the idea if anyone wants to see! Just tell my your email. Just something I thought up when I was bored