Downtown Jacksonville isn’t particularly vibrant at night. Despite years of efforts from city leaders and community groups to boost the appeal of the northeastern Florida city’s center, Downtown streets are largely deserted by the end of the traditional workday. However, that situation could be changing as a number of Jacksonville’s leading restaurateurs and nightlife operators have signaled their willingness to invest in the district. Allan DeVault, managing partner of the hugely successful Black Sheep restaurant in Jacksonville’s Riverside neighborhood, is opening a second, still-to-be-named location in Downtown. He sees it as risky, but wants to be part of the district’s renaissance.