This place is currently running an active dark room retreat and certainly looks like the place to go if your interested in giving it a try .
Besides the linked article they also have tons of other great dark room information including an article entitled “The Maximal Activation of the Pineal” !
In order to stay in complete darkness, forty-five people in all gathered from all over the world at Tao Garden Health Resort near Chiang Mai, Thailand, in February 2002. Well-known Taoist teacher, Master Mantak Chia, organized the retreat into darkness. The Darkroom I Retreat was promoted as a venue for the Kan and Li meditations—a higher level in the hierarchy of Master Chia’s teaching. Interestingly enough, there were several participants who had very little previous exposure to Taoist practices. During the first two weeks, some participants completed the one or two weeks that they had reserved for the Darkroom Retreat. Most participants stayed in the Darkroom for three weeks.
More Pieces Of The Puzzle ....

