Probably worth its own thread (for those who like science-magazine math puzzlers)
I thought the spacing still had to be 2m/6 feet in any direction, minimum. I think the max in narrow bodies would be no pax on alternate rows, 2 pax for other rows (window or center)
O = empty seat, X = Pax
XOO OXO
OOO OOO
OXO OXO
OOO OOO
XOO OOX
....etc.