FUMOP:

Sidheag McCormack writes:

easiest of course, but a warm room sufficiently close to where the baby
sleeps would probably also work.

this sounds as though down a short hallway is fine, not what I meant to
say, oops! What I meant of course is that if you and the baby are sleeping
in different places, but in the same room, and that room is warm, then
that's probably not too much worse than cosleeping.

Sidheag