Over years of avid art viewing, particular museum security guards have become as familiar to me as the art they guard though we’ve never exchanged words. ‘Artists Guarding Artists’ a group show at Family Business breaks the silence with work by artists who work as guards at the city’s major museums, from the Met to the New Museum. Next time I go to the Guggenheim, I’ll be looking for Sandro Rodorigo to congratulate him on his tongue-in-cheek, self-aggrandizing ‘Sandro at Work: The Great Self-Portrait.’ Though it’s a small painting, it perfectly pillories art world hierarchies of importance that don’t favor guards. (Through August 17th).