Rookery /(?)/

pl. Rookeries

1. The breeding place of a colony of rooks; also, the birds themselves.
2. A breeding place of other gregarious birds, as of herons, penguins, etc.
3. The breeding ground of seals, esp. of the fur seals.
4. A dilapidated building with many rooms and occupants; a cluster of dilapidated or mean buildings.
5. A brothel. [Low]