From their home page: http://csp.org/
The Council on Spiritual Practices is a collaboration among spiritual guides, experts in the behavioral and biomedical sciences, and scholars of religion, dedicated to making direct experience of the sacred more available to more people. There is evidence that such encounters can have profound benefits for those who experience them, for their neighbors, and for the world.

CSP has a twofold mission: to identify and develop approaches to primary religious experience that can be used safely and effectively, and to help individuals and spiritual communities bring the insights, grace, and joy that arise from direct perception of the divine into their daily lives.

The Council on Spiritual Practices has no doctrine or liturgy of its own.
They have a very large database of quotes from hundreds of researchers studying entheogens - substances that help awaken our awareness of the divine within.