You have a lot more rooms in your mansion.

Foyer (entrance), conservatory (sitting room/letter writing/reading room), linen room, wine cellar/tasting room, a crafts/present wrapping room, greeting rooms (rooms adjacent to a person's 'office' or personal space where they meed guests), gym, indoor pool room, servant's/worker's quarters, storage for seasonal decorations, kids areas (bedrooms, special dining area, play area, in-home schooling room), 'telephone' rooms or closets, of course formal ball rooms (for large dancing parties) that are adjacent to formal dining rooms (large enough to site 80 to 100 people at the same time), game room, home theater, library,
And lots more ....