Like the mainland’s Standard boutique hotels, newcomer Romer House Waikiki is hip, chic and adults-only. Its midcentury-modern aesthetic with nods to local heritage also applies to onsite restaurant Izakaya 855-Aloha’s hybrid Japanese/Hawaiian cuisine. Lounge in The Backyard’s daybeds by the pool with dining service. Environmental initiative partners include King Kalākaua Park, Hawaiian Legacy Reforestation and Waikiki Community Center’s Genki Ala Wai Project.