“Harry Potter” star Daniel Radcliffe showed a wizardly touch at pingpong at a wrap party for his new film, “Kill Your Darlings,” Sunday night. “Daniel had the whole party crowded around him as he challenged different partygoers to table tennis,” said a spy at cool pool hall Slate. The film also stars Elizabeth Olsen, Jennifer Jason Leigh, Kyra Sedgwick and Ben Foster. “The whole cast is clearly great friends,” the spy added. “Everyone was extremely supportive and cheering loudly for Daniel” at the Svedka vodka-sponsored bash.