The latest trend in hip hotels is to design the rooms less like a hotel room and more like a personal home—open, loft-like floor plans outfitted with eclectic furnishings, modernist lighting and bespoke amenities. Case in point: Philadelphia's new Roost, an extended-stay hotel with a boutique-style update that ticks all of our design boxes. Herewith, a few interior cues that you can use when pulling together your home.