As the island’s only all-adult hotel, Romer House offers an impeccable setting for sophisticated events (minus the stuffiness). The brand new, adults-only second-floor pool and bar, Backyard, is decked out for grown-up daytime garden parties. Downstairs, the subdividable Izakaya 855-Aloha is perfect for anything from private dinners to full blowouts, and can host up to 200 guests (even children, if they’re invited).