International Building Code 303.1
Assembly Group A. Assembly Group A occupancy
includes, among others, the use of a building or structure, or a
portion thereof, for the gathering of persons for purposes such
as civic, social or religious functions; recreation, food or drink
consumption; or awaiting transportation.
Exceptions:
1. A building used for assembly purposes with an occupant
load of less than 50 persons shall be classified as
a Group B occupancy.
2. A room or space used for assembly purposes with an
occupant load of less than 50 persons and accessory to
another occupancy shall be classified as a Group B
occupancy or as part of that occupancy.
3. A room or space used for assembly purposes that is
less than 750 square feet (70 m2) in area and is accessory
to another occupancy shall be classified as a
Group B occupancy or as part of that occupancy.
Assembly occupancies shall include the following:
A-1 Assembly uses, usually with fixed seating, intended for
the production and viewing of the performing arts or
motion pictures including, but not limited to:
Motion picture theaters
Symphony and concert halls
Television and radio studios admitting an audience
Theaters
A-2 Assembly uses intended for food and/or drink consumption
including, but not limited to:
Banquet halls
Night clubs
Restaurants
Taverns and bars
A-3 Assembly uses intended for worship, recreation or
amusement and other assembly uses not classified elsewhere
in Group A including, but not limited to:
Amusement arcades
Art galleries
Bowling alleys
Places of religious worship
Community halls
Courtrooms
Dance halls (not including food or drink consumption)
Exhibition halls
Funeral parlors
Gymnasiums (without spectator seating)
Indoor swimming pools (without spectator seating)
Indoor tennis courts (without spectator seating)
Lecture halls
Libraries
Museums
Waiting areas in transportation terminals
Pool and billiard parlors
A-4 Assembly uses intended for viewing of indoor sporting
events and activities with spectator seating including,
but not limited to:
Arenas
Skating rinks
Swimming pools
Tennis courts
A-5 Assembly uses intended for participation in or viewing
outdoor activities including, but not limited to:
Amusement park structures
Bleachers
Grandstands
Stadiums