Today’s rock’n’roll hotel is less about threats of incidental bodily harm and more about a glamorously decadent atmosphere, and the new model is a place like the Sanctum Soho.Here it means a dash of modern minimalism, a sprinkling of baroque opulence, and an emphasis on the darker end of the color palette. The in-room electronics are totally up to date, while some throwback touches are retained for atmosphere’s sake. It’s a twenty-four-hour hotel with a liberal, tolerant service concept; what you want, you’ll get, without so much as a raised eyebrow. In that, it’s not so fundamentally different from some of London’s more conservative luxury hotels — it just feels naughtier.