Mitchell's early civil rights activism included organizing, in 1943 at the age of 13, both black and white teenagers in pickets and other actions at the Windsor Theatre in Chicago, which segregated black customers in the balcony, and also at a nearby segregated bowling alley. The lack of success of picketing and leafletting led the young Charlene to organize another action for her group of activists, who took the name American Youth for Democracy. They held a sit-in at the Windsor, with white members going up to the "colored only" balcony while black members took their seats in the auditorium's "whites only" section below.