A conference hall or conference room is a room

Room

A room is any distinguishable space within a structure.Room may also refer to:* Room , by Emma Donoghue* Room, Nepal* Room for PlayStation Portable, a social networking service* Thomas Gerald Room , Australian mathematician...

 provided for singular events such as business conferences and meetings. It is commonly found at large hotel

Hotel

A hotel is an establishment that provides paid lodging on a short-term basis. The provision of basic accommodation, in times past, consisting only of a room with a bed, a cupboard, a small table and a washstand has largely been replaced by rooms with modern facilities, including en-suite bathrooms...

s and convention center

Convention center

A convention center is a large building that is designed to hold a convention, where individuals and groups gather to promote and share common interests. Convention centers typically offer sufficient floor area to accommodate several thousand attendees...

s though many other establishments, including even hospitals, have one. Sometimes other rooms are modified for large conferences such as arena

Arena

An arena is an enclosed area, often circular or oval-shaped, designed to showcase theater, musical performances, or sporting events. It is composed of a large open space surrounded on most or all sides by tiered seating for spectators. The key feature of an arena is that the event space is the...

s or concert halls. Aircraft

Aircraft

An aircraft is a vehicle that is able to fly by gaining support from the air, or, in general, the atmosphere of a planet. An aircraft counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines.Although...

 have been fitted out with conference rooms. Conference rooms can be windowless for security purposes. An example of one such room is in the Pentagon

The Pentagon

The Pentagon is the headquarters of the United States Department of Defense, located in Arlington County, Virginia. As a symbol of the U.S. military, "the Pentagon" is often used metonymically to refer to the Department of Defense rather than the building itself.Designed by the American architect...

, known as the Tank.

Typically, the facility provides furniture

Furniture

Furniture is the mass noun for the movable objects intended to support various human activities such as seating and sleeping in beds, to hold objects at a convenient height for work using horizontal surfaces above the ground, or to store things...

, overhead projector

Overhead projector

An overhead projector is a variant of slide projector that is used to display images to an audience.-Mechanism:An overhead projector typically consists of a large box containing a very bright lamp and a fan to cool it. On top of the box is a large fresnel lens that collimates the light...

s, stage lighting

Stage lighting

Modern stage lighting is a flexible tool in the production of theatre, dance, opera and other performance arts. Several different types of stage lighting instruments are used in the pursuit of the various principles or goals of lighting. Stage lighting has grown considerably in recent years...

, and a sound system

Sound reinforcement system

A sound reinforcement system is the combination of microphones, signal processors, amplifiers, and loudspeakers that makes live or pre-recorded sounds louder and may also distribute those sounds to a larger or more distant audience...

.

Smoking

Smoking

Smoking is a practice in which a substance, most commonly tobacco or cannabis, is burned and the smoke is tasted or inhaled. This is primarily practised as a route of administration for recreational drug use, as combustion releases the active substances in drugs such as nicotine and makes them...

 is normally prohibited

Smoking ban

Smoking bans are public policies, including criminal laws and occupational safety and health regulations, which prohibit tobacco smoking in workplaces and/or other public spaces...

 in conference halls even when other parts of buildings permit smoking.

Sometimes the term 'conference hall' is used synonymously

Synonym

Synonyms are different words with almost identical or similar meanings. Words that are synonyms are said to be synonymous, and the state of being a synonym is called synonymy. The word comes from Ancient Greek syn and onoma . The words car and automobile are synonyms...

 with 'conference center' as, for example, in 'Bandaranaike Memorial International Conference Hall

Bandaranaike Memorial International Conference Hall

The Bandaranaike Memorial International Conference Hall , is a convention center located in Colombo, Sri Lanka. Built between 1970 and 1973 the convention center was a gift from the People's Republic of China in memory of Solomon Ridgeway Dias Bandaranaike, Prime Minister of Sri Lanka from 1956 to...

'.