I managed to knock off a reasonable chunk of the roads I had left to walk around the University at the north-eastern extremity of my mile on this nice sunny walk. As well as being impressed by the number of big townhouses now occupied by various departments, I took some time on my way there to check out a war memorial, and some time on the way back to do a little extra wandering of Berkeley Square.
The Theosophical Society also lets its lodge be used by a variety of other organisations, including the Bristol Dowsers; a branch of Carlos Castaneda's Tensegrity folk (some of the videos of Tensegrity are quite something); a meditation group; and the local branch of the White Eagle Lodge, founded by a medium who received various teachings from the eponymous founder.
Given that those are the groups who openly practise there, I can only imagine the list of occult factions who use the rooms on other days...