Do you go to Netflix and chill out with the girl or the boy with her?
Does not matter
So first of all, Netflix & Chill doesn't have to automatically include an overnight stay. But occasionally you can just spend a day or afternoon together. But where you should stay, if that's the goal of both of them, doesn't matter.
As a tip from personal experience, of course, perhaps more where the parents are a little more relaxed and not always who distracts, disturbs, etc.
No matter where it fits better and maybe the parents are not at home.