Red Lotus Kitchen & Bar is expected to open as early as the first week in April — with gold Chinese calligraphy on its walls, dim sum on its tables and silk lanterns hanging from the ceiling. Chef Buu "Billy" Ngo and partner Peter Kwong are opening the contemporary Asian-fusion restaurant at 2718 J St. following their success with Japanese restaurant Kru, a few blocks down the street. The restaurant initially was expected to open in December in the spot where G.V. Hurley's closed its doors in September. A liquor license transfer held up the opening of Red Lotus, Ngo said. Following a restaurant trend toward small plates of food or "tapas," the restaurant will focus on small dishes, prima