In recent years, and in successive waves, San Francisco’s South of Market (SoMa) district has been transformed from an industrial zone inhabited by large working-class and transient populations to a “revitalized” commercial and cultural hub filled with upscale condos and dot-com offices. Shortly after Airbnb opened its new headquarters there last year, city officials forcibly removed homeless encampments under the freeway overpasses that crisscross the neighbor-hood. Less than a block away at SOMArts, one of the city’s few surviving nonprofit art spaces, independent curator Juana Berrío recently