The green tarp-covered streatery in front of Rosemary Bistro Cafe doesn’t call much attention to itself-it’s the sort of unlovely but practical structure that popped up all over the city after the pandemic hit. An older-leaning Chevy Chase DC crowd enjoys Covid-safe meals there, while drivers heading downtown on Connecticut Avenue notice the structure only when they suddenly have to merge left to get around it. But in the minds of a few outspoken neighbors, this unremarkable platform’s continued presence is intolerable.