We use common house for meals trice per week. Sounds a lot like yours.
People watch videos there.
We have 2 guest rooms, sometimes they are in use a lot, sometimes not, but they are much appreciated. The laundry is used by all the residents of the Mansion plus one family from the townhomes. Hot tub installation in lower level is in process, so can't say how it will be used. Kids room gets a fair amount of use by younger kids and visitors. Plus other singalongs, etc.