Come join the Cape Girardeau Roller Girls for a screening of the documentary "Derby, Baby!" at Port Cape Girardeau. Doors open at 7 p.m. Saturday with the film beginning at 8 p.m. The cost is free, but donations will be accepted to offset the cost of the film. There will be a full-service bar and $5 appetizer buffet. After the movie, stay and dance the night away with your favorite roller derby league. For more information about the film, go to www.derbybabythefilm.com.