Uhhhh Cain's gone so Room Seven is technically free, but Anton keeps those for staff, so unless Vincent can make a good case for why he should get it, Anton would put him somewhere else.

Otherwise there's Room Six, which is a twin-room he'd have to share with Casey, or Room Nine, which is a four-person dorm with a kedan and Tim of the batpeople variety. Hotel's a bit full these days. :P