With a solid reputation for under the sea delicacies, Zenbu Sushi branches out to an unexplored nightlife realm. Koi Lounge, Zenbu's latest addition, is a sleek dark lounge chic with candle light and black matte walls. The more-than-intimate space of 800-square-feet allures a young, posh La Jolla crowd. Sip on a signature Asian-inspired cocktail as you admire the oversized koi fish mural. From cocktails to fine wine and sake bombs, Koi's mainly upscale character is anything but predictable.