No one wants to do that any more. This was far more common before the electronic age overtook us. Now, with iphones, computers and so many other devices, the concept of sitting in a circle for many weeks or months turns most people off. Some may try it for a short time just "for a lark" but wouldn't take it very seriously. I can't even find one to do it let alone a group. If only I was a natural medium, I wouldn't need the additional energy of other people.
Why were you disappointed by the Scole Hole, and did the handshake you experienced seem real? This happened to other visitors there as well. Some people were able to see the outline of an entity while others saw nothing, but they all agreed that the handshake was not imaginary. Also, those lights you described were shown in the video, and a few were seen going through a coffee table. It doesn't surprise me, as objects that appear solid to us do not appear solid to them.
It wasn't the Scole Hole that disappointed me. It was that the experiment didn't achieve what was promised.
The handshake felt as natural as any from an incarnate. It's all interesting stuff but physical phenomena have been around for decades and often were better done in the earlier days.
The lights were less surprising than just plain interesting. I already knew of that phenomenon because it was a common one at the time and had been described earlier in the 'Spiritual Scientist'.