The Sufi and other books by Idries Shah.
The joint conference on Science and Mysticism featuring Karl Pribram and Pir Valet Inayat Khan.
Whirling with the dervishes...
Been there; done that.
At the risk of offending the "powers that be" this group is sponsored by the (organizational) "descendants" and a few of the original of Korzybski's "camp followers". It is frequented by some of them and other would-be initiates who, in Shah's words, carry on as best as they can. I function as much as a thorn as anything else. We even occasionally manage to actually communicate. Any "rigidity" about anything is up to you, the initiator of the topic, but beware of the moderators. Some participants will give you their opinions.
Welcome aboard, and have fun.