‘27 Nights’ Stream it on Netflix . In 2005, the Argentine artist and writer Natalia Kohen was committed to a psychiatric institution against her will by her children in what turned out to be a corrupt scheme to control her finances. That sordid tale provides the loose inspiration for the Uruguayan director Daniel Hendler’s mordant drama. The renowned Argentine actress Marilú Marini plays Martha Hoffman, an 83-year-old art collector, whose bohemian interests, unabashed promiscuity and