I used a Quaker centre for some of my early talks in 2002. Located on Byng place near the University of London Union(ULU) building and also near the large Waterstones bookshop it is no longer a Quaker centre but is being renovated and converted into a hotel. It wasn't an ideal venue and had a stuffy school room feel to it, but it was cheap.
Here I am in the middle of one of my early talks. This was the 7th indoor talk I ever did and 15 people came which at that time was a good sized audience for me. This particular talk was in July but I remember I had a bad cold which meant I wasn't very sparky at all. But it was all part of the learning experience.