To me 1/2 or 1/2/3/4 left to right looking top down on plane makes sense given how most languages (ones that I can at least partially understand) all go left to right.

Either way, the question remains how many toilets to customers are required by law to operate and how frequent is this? It seems crazy that AC have a 200%+ surplus when they could just knock out half of them and fit another 10 seats in.

Other question, were the sacrosanct J (and PY/J) washrooms open to all pax?