FOR the second time in 10 minutes yesterday, Lizzie Grubman and her potty posse took over the ladies' room. And wouldn't you know it. Nature called. So there I was, on the third floor of Suffolk County's Criminal Court building, poised outside the lair of the peroxided Mercedes maven, heretofore to be known as the Princess of Pee. But just as I was about to seek my own private audience with the public plumbing, I was stared down by a man who must be 7 feet tall. "Please wait 'til she's done," the bruiser requested. This brought a compelling new...