Jessica Hausner takes concepts such as workaholism or dieting and makes them into extremes. In her 2019 film “Little Joe” a scientist became so engrossed in cultivating her indoor plants that she would choose them over her children. “Club zero” takes place in a high-school in a non-descript city. Ms. Novak (Mia Wasikowska), a nutrition teacher just joined the school, she comes with her own branded weight-loss tea, it has her face on the package.