At 95, the dancer, choreographer and activist Anna Halprin has no time for nostalgia. Last summer she celebrated her birthday with a performance on the dance deck at her home in Marin County. Bare feet on redwood boards, white hair framed against the pine trees beyond, she was as present and lively as when her late husband and collaborator, the landscape architect Lawrence Halprin, first built the deck for her in 1954. Read More …