Originally Posted by
GadgetGal
LCY-JFK 15th august. I think my confusion was because I couldn't see a key in MMB, to tell which are the occupied seats.
however,I have since found experflyer which tells me which seats are taken.
it also shows that I have a seat mate on the outward flight. Bah!

Then 0% chance of an aircraft sub. As you've no doubt figured out, white is for unoccupied seats.
Your flight is only selling 6 more J seats. Rows 6,7,8 are empty at the moment.