Chambers – this legal term has several meanings, depending of where it has got application:

1) It could refer to a private room, or court from which the public participants are excluded in which a District Judge or Judge may conduct certain types of hearings.
2) It could also refer to regulating non-governmental institution where professionals in certain job are participating in order to give advices/consultations. For example, notary bar chamber is the professional organization which rules the work and membership of notaries in particular country.

“Chambers” origins from “chamber”, which literally means a room, hall, apartment.