The purposes for which D-20 is organized are:
- To foster community welfare in the furtherance of the game of contract bridge in its various forms of competition;
- To promulgate high standards of conduct and ethics to its members and to enforce such standards;
- To provide organized bridge activities and services to satisfy the social, recreational, and competitive needs of the membership and the community;
- To provide educational programs to teach people how to play bridge and to introduce them to duplicate bridge;
- To conduct tournaments and other competitive events as permitted by the American Contract Bridge League; and
- To conduct such other activities as may be in keeping with its principal purposes.