Michael Douglas is bouncing back from chemotherapy and radiotherapy to battle throat cancer. The “Wall Street: Money Never Sleeps” star was working out at Equinox on 76th and Columbus on Tuesday. “Most staff and club members kept a respectful distance,” our spy said. “But a few wished him well, which he said he appreciated.” A smiling Douglas also seemed to be in good spirits when he was spotted walking his family dog, Figaro, in Central Park. Douglas says he’ll learn this month if his cancer has gone into remission.