Local Chapters of ATOS are the organizations that really do all the work of preserving and presenting Theatre Organ to the public. Please lookup the Chapters in your area and get involved!

Chapter State/Prov. Citysort descending
Mount Shasta California
Orange County California
CONNECTICUT VALLEY Connecticut
CENTRAL FLORIDA Florida
SOUTH FLORIDA Florida
HILO Hawaii
CEDAR RAPIDS Iowa
PINE TREE Maine
EASTERN MASSACHUSETTS Massachusetts
CENTRAL MINNESOTA OTTER TAIL Minnesota
MAGNOLIA Mississippi
GARDEN STATE New Jersey
SOUTHERN JERSEY New Jersey
CUMBERLAND VALLEY Pennsylvania
DELAWARE VALLEY Pennsylvania
LA CROSSE SCENIC BLUFFS Wisconsin
PACKERLAND Wisconsin
Australia Felix Australia-Wide
FREE STATE Maryland
Cinema Organ Society (affiliate) United Kingdom
ATLANTA Georgia Atlanta
JESSE CRAWFORD Montana Billings
BINGHAMTON THEATER ORGAN SOCIETY, INC. New York Binghamton
Alabama Alabama Birmingham
PIEDMONT North Carolina Burlington
ROME NEW YORK New York Central New York
METROLINA North Carolina Charlotte
CHICAGO AREA Illinois Chicago
CHICAGOLAND Illinois Chicago
OHIO VALLEY Ohio Cincinnati
WESTERN RESERVE Ohio Cleveland
PIKES PEAK Colorado Colorado Springs
NORTH TEXAS Texas Dallas / Ft. Worth
ROCKY MOUNTAIN Colorado Denver
MOTOR CITY Michigan Detroit
Detroit Theatre Organ Society (affiliate) Michigan Detroit
RED RIVER North Dakota Fargo
SEQUOIA California Fresno
Houston Theatre Organ Society Texas Houston
CENTRAL INDIANA Indiana Indianapolis
FIRST COAST Florida Jacksonville
JOLIET Illinois Joliet
KANSAS CITY Missouri Kansas City
Lansing Theatre Organ, Inc. (affiliate) Michigan Lansing
NEVADA DESERT LIGHTS Nevada Las Vegas
BLUEGRASS Kentucky Lexington
LONDON and SOUTH of LONDON England, General London
Los Angeles California Los Angeles
DAIRYLAND Wisconsin Milwaukee
LAND O' LAKES Minnesota Minneapolis / St. Paul
NEW YORK New York New York City
KINGSTON Canada Odessa
RIVER CITY Nebraska Omaha
SOUTHEAST TEXAS Texas Orange
Valley of the Sun Arizona Phoenix
Pittsburgh Area Theatre Organ Society Pennsylvania Pittsburgh
OREGON Oregon Portland
OLD DOMINION Virginia Richmond
Rochester Theatre Organ Society (affiliate) New York Rochester
SIERRA California Sacramento
GREAT LAKES BAY Michigan Saginaw
GREAT SALT LAKE Utah Salt Lake City
Island Empire California San Bernadino
San Diego California San Diego
Nor-Cal California San Francisco
SANTA BARBARA California Santa Barbara
MANASOTA Florida Sarasota
HUDSON MOHAWK New York Schenectady
PUGET SOUND Washington Seattle
SPOKANE FIRST NAZARENE Washington Spokane
CENTRAL ILLINOIS Illinois Springfield
Saint Louis Missouri St. Loius
TOLEDO AREA Ohio Toledo
NORTHERN MICHIGAN Michigan Traverse City
SOONER STATE Oklahoma Tulsa
COLUMBIA RIVER Washington Vancouver
Dickinson Theatre Organ Society Delaware Wilmington
SUSQUEHANNA VALLEY Pennsylvania York