August 3, 2021 PROVIDENCE — It’s a sticky 91 degrees on a late Friday afternoon in July, and although the chalk-decorated A-frame sign announces “Pop-Up Market,” the sidewalk outside the Urban Greens Food Co-Op in the West End feels more like a block party. A DJ moves in rhythm as he blasts Michael Jackson’s “Wanna Be Startin’ Somethin.” Pedestrians pause as women in colorful African fabrics lift produce from vehicles parked curbside and pile it high in orderly rows of wicker baskets on three long plastic folding tables covered in floral vinyl tablecloths, under which hangs a banner that reads “AARI Bami Farm,” the African Alliance of Rhode Island. The eldest of the…