What kind of organizations do Chinese communities in American cities belong to?

Chinese communities in American cities are non-governmental organizations.

Non-governmental organizations In a broad sense, non-governmental organizations refer to social intermediary organizations other than party and government organs, enterprises and institutions.

What we usually call non-governmental organizations is the collective name of social groups, private non-enterprise units and foundations. A social organization refers to a non-profit social organization formed voluntarily by citizens of China and carrying out activities in accordance with its articles of association to achieve the consent of its members. Private non-enterprise units refer to social organizations engaged in non-profit social service activities organized by enterprises, institutions, social organizations, other social forces and individual citizens using non-state-owned assets. Foundation refers to a non-profit legal person established for the purpose of engaging in public welfare by using the property donated by natural persons, legal persons or other organizations.