Originally Posted by
mehitabel
Also, I asked the FA about the lavs between Polaris and PE - she shrugged and said nobody has any idea which cabin they are meant for, so PE is welcome to use them.

They are for Polaris, that's why there is a curtain. And why they make the announcement to use the lavs in your cabin. Premium Economy is Economy.
On my flight yesterday, the FA's actually blocked PE pax from using the J lavs with carts in the aisle just inside the curtain. I strongly suspect that was an FAA violation, but appreciate their frustration if repeated warnings were not working.