>>531916353
https://rimworldwiki.com/wiki/Mood
bedrooms can pull double duty as dining and rec room with no penalty, so if they're all lovers with adjacent beds you can get +15 mood very easily and up to +24 once fully pimped out.

meanwhile even an impressive barracks is actually a -1 mood penalty since pawns hate sharing a bedroom....but if it's a harem they'll share a bedroom without issue so you can put your leader and his five wives in adjacent beds without penalty