LLOHANGYM060107_01.jpgLindsay Lohan LLOHANGYM060107_02.jpgRehab is hard. Well, it is if you stay in it. Lindsay's been leaving the Promises (resort) for late night rendez-vous and excursions to the gym - doesn't Promises have a health club of its own? Still, it's good she's exercising - sweating out all those toxins. But the question is, when's she going to be ready to work on that Shirley MacLaine movie?