Anton would be willing to give him a room, but that would cost; if Bladewolf doesn't need a room per se, as opposed to just somewhere to flop for a while, would he prefer just being able to use the Hotel's commons as a place of retreat?

It's free that way, and he wouldn't be the first person without the need for food/sleep/biological stuff who uses the Hotel as a home-base without paying for a room. (The other one is a skeleton.)