At one company it ended up being a temporary closet room with printer supply and all kind of stuff people randomly tossed in to clear the way. At my current company there's so few people using it it smells dusty and closeted to the point it's unusable to relax.
ad-hoc places worked better for me, like small meeting rooms that are unused at noon, actual storage rooms that are actually very clean and tidy compared to temporary ones, or even a park bench when weather is nice enough