It wasn't a one-on-one, alas, but I well remember the day I was ushered into a South Coast Rep rehearsal room for a sort of four-way interview: myself, another reporter, the press rep (Cristofer Gross), and Randy Newman, dressed in de rigeuer Hawaaian shirt. The occasion was a sort of revue of his work that music director Michael Roth and literary director Jerry Patch had cooked up called, after Henry Adams, The Educ…