Michael Sarrazin, Jane Fonda, ‘They Shoot Horses, Don’t They?’ Harrowing Tale of Dance Marathons and the Depression-Era Downtrodden. But Those Marathons Remind Us of Something Else — the Studio System at its Most Heartless Contains spoilers By Paul Parcellin “They Shoot Horses, Don’t They” is a noir tragedy about exploitation of the desperate and beleaguered…