ARCH Development is doing it real big. The local nonprofit is one of the partners behind LUMEN8Anacostia, the initiative that will open pop-ups and art shows in the neighborhood’s vacant storefronts. Tonight, ARCH kicks off the happenings with a grand festival, and while purveyor of manufactured cool The Pink Line Project is hosting a big launch party, this is ARCH’s celebration. It’s worked for more than 20 years to revitalize Anacostia’s commercial strip with a creative-economy bent (jump-starting, notably, Honfleur Gallery and Vivid Solutions Print Lab). The Pink Line-led soirée kicks off at noon at The Lightbox (the name organizers have given to an old police storage warehouse on Shannon Place SE), but festivities—including exhibits at Vivid Solutions, theater by the Serenity Players, live music, breakdancing, and slam poetry—will dot Martin Luther King Jr. Avenue and Good Hope Road all night. Silent films and light projects start at dusk. The Washington Area Bicyclist Association is hosting a bike valet, and Busboys & Poets is catering. The menu includes vegan parfaits. The Lightbox party begins at noon at 2235 Shannon Pl. SE. lightboxdc.com. The party Behind the Big Chair begins at 4 p.m. at 2020 Shannon Place SE. Many temporiums remain open through June. All events are free. lumen8anacostia.com.