In the Cunningham studio, “dancers were rehearsing Roaratorio, a work last performed by the modern dance company in 1997. A lean, young man shuffled and picked up his feet in a series of pas de chats in front of Robert Swinston, assistant to the choreographer, and Patricia Lent, a former dancer who had performed the original version of the dance. They both shook their heads. ‘I interpreted that as this step,’ Ms. Lent, 50, said as she demonstrated the move. ‘But I don’t know. Maybe. Maybe.'”