There are a small but growing number of groups, based in this country that work with Crowley's ideas. The following list is not exhaustive, but gives some of the main contact points. It is recommended that you do not atttempt to join all of them at once.
OTO, this stands for Ordo Templi Orientis (Order of the Eastern Temple. A magical order, based on eastern eroto-gnostic techniques, some derived from Tantrism. Existed, long before Crowley came on the scene but soon became the principle vehicle for his magical work. Has undergone a big revival over the last ten years. Perhaps it is fortuititous that the OTO split into several rival tendencies following the death of Crowley's successor, Karl Germer. Many magicians feel that magical orders, structured on medieval lines, may not be the appropriate vehicle for Thelema. But as things stand the aspiring candidate must make a choice after investigating and weighing up what both groups have to offer, if anything. In England there are two main groups claiming title to Crowley's mantle: In other parts of Europe and the world, other OTOs exist and can claim priority. There are currently legal threats flying between these groups, so I hope I get it right.
i. OTO 'Caliphate' - BM Thelema, London WC1N 3XX - International HQ: Postfach 33 20 12 D-14180, Germany. More 'traditional' if it can be termed so. Uses original OTO Masonic style rituals and charges annual subscriptions and initiation fees.
ii. OTO 'Typhonian' BM Starfire, London WC1N 3XX. Ruled by famous occult scholar Kenneth Grant, whose book Aleister Crowley & the Hidden God, revolutionised the understanding of Crowley magick. Ditched the old Masonic style rituals in favour of the syllabus very like the Argentinum Astrum, i.e. individual graded magical practices leading to adeptship.
Non OTO Thelemic Groups
Apart from the 'OTOs' there are a number of 'new wave' magical groups and orders that are trying to refashion the occult community on more 'rosicrucian' lines, which seem more in tune with modern needs. Strict hierarchies, authoritarianism and obscurantism are definitely out. An honest attempt to build a fellowship or sodality of magicians is on the cards. Amongst these are:
Golden Dawn Occult Society
PO Box 250, Oxford, OX1 1AP. (email C/O Ogdos@mandrake.uk.net or http://www.uk.net/ogdos.htm. Offers a foundation course in magick and other training to associate members (associate membership is ?5 pa.). Is part of a growing network of individuals and groups throughout Britain and all over the world. Online newsletter.
Chaos magic and the Illuminates of Thanateros (IOT)
C/O, BM Sorcery, London WC1N 3XX, Another important new style of magick that has developed out of the Thelemic one. Other influences include new physics and European shamanism.
The Kaula-Nath Community (including AMOOKOS). C/O PO Box 250, Oxford, OX1 1AP. East- West tantrik groups, founded by Dadaji, one of Crowley's disciple's in the 1930s who, on the master's advice, went to India and became a sadhu. A unique blend of western Occultism with authentic magical Hinduism. Has an older equivalent of Crowley's 'Law of Thelema' - viz: svecchacara - 'the path of ones own will'.
Books You Might Enjoy:
Aleister Crowley - Alexandra
Aleister Crowley - To Man
Aleister Crowley - Gargoyles
Aleister Crowley - Poems
Aleister Crowley - Oracles