we'll be first time on Edge next spring, but 10 previous Celebrity cruises.... I understand there's 4 different main dining rooms, all with different themes, Italian, Med, French etc... do you need to pre-book or reserve for each evening, or just walk up anytime ? is there a line up for these dining rooms ? obviously, different tables and wait staff I would assume ? in the past, we preferred the standard "fixed" dining arrangements, so this will be a different experience ! cheers