Old Town Hall Building c. 1936 (Library of Congress). The second Mamaroneck United Methodist Church building (Mamaroneck, New York), which was raised on May 8, 1845. The Mamaroneck United Methodist Church moved into its present building on the Boston Post Road in 1859. The building also served as Town Hall in Mamaroneck. The building has served as American Legion Post 90 since 1946.