The moody exterior – all minimal slate grey and black – belies a surprisingly airy interior, where clever lighting and a breezy colour palette open up the clean, contemporary public spaces. The 84 rooms, meanwhile, are spacious and well-equipped with wide platform beds and more futuristic fixtures and fittings than any gadget geek could ever tire of. Particularly good are the B-Corner Rooms, with views over bustling Gran Via. But it is the public amenities than really make the B Hotel stand out among its budget competitors, including a rooftop infinity pool that’s dangerously close to the edge of the building, a boisterous tapas bar that’s become something of a destination in its own right, and a first-floor breakfast room whose buffet sets any day off right. Indeed, you certainly get a lot of bang for your buck here.