Fortunately, there’s Margaret Atwood. Rebecca Mead notes this about Atwood’s writing space in a recent profile:
Unlike many writers, Atwood does not require a particular desk, arranged in a particular way, before she can work. “There’s a good and a bad side to that,” she told me. “If I did have those things, then I would be able to put myself in that fetishistic situation, and the writing would flow into me, because of the magical objects. But I don’t have those, so that doesn’t happen.” The good side is that she can write anywhere, and does so, prolifically.
So set up a writing space to all your favorite specifications. By all means, be comfortable when writing. But don’t let that stop you from writing whenever and wherever and however you need to.