I'm curious about this phrase
Will you be needing [...] ?
It seems gramatically correct; I am also fine with "need" used in continuous time. But I'm wondering if it is used in spoken language...
For example, I want to take a shower (which might take a while) so I ask my roommate if he is fine with that:
Will you be needing the bathroom?
Is this the proper way to do it? Or would native speaker come up with something easier?