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. City
Connecticut Valley Connecticut
Central Florida Florida
South Florida Florida
MAGNOLIA Mississippi
Delaware Valley - Eastern Pennsylvania Pennsylvania
Packerland Wisconsin
Australia Felix Australia-Wide
Cinema Organ Society (affiliate) United Kingdom
Southern Jersey New Jersey
Atlanta Georgia Atlanta
JESSE CRAWFORD Montana Billings
Binghamton Theatre Organ Society, Inc. New York Binghamton
Alabama Alabama Birmingham
Piedmont North Carolina Burlington
Free State Maryland Catonsville
Cedar Rapids Iowa Cedar Rapids
Cumberland Valley Pennsylvania Chambersburg
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 Theatre Organ Society North Dakota Fargo
Orange County California Fullerton
Houston Texas Houston
Central Indiana Indiana Indianapolis
Garden State New Jersey Jersey City
Joliet Area Illinois Joliet
Kansas City Missouri Kansas City
Kingston Canada Kingston
Lansing Theatre Organ, Inc. (affiliate) Michigan Lansing
Bluegrass Kentucky Lexington
London and South of England England, General London
Los Angeles California Los Angeles
Carolina Theatre Organ Society North Carolina Matthews
Dairyland Wisconsin Milwaukee
Land O' Lakes Minnesota Minneapolis / St. Paul
New York New York New York City
Pine Tree Maine Old Orchard Beach
River City Nebraska Omaha
Valley of the Sun Arizona Phoenix
Pittsburgh Area Theatre Organ Society (Affiliate) Pennsylvania Pittsburgh
Columbia River 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
San Diego California San Diego
NorCal 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
Saint Louis Missouri St. Loius
NORTHERN MICHIGAN Michigan Traverse City
Sooner State Oklahoma Tulsa
Dickinson Theatre Organ Society Delaware Wilmington
Susquehanna Valley Pennsylvania York