The Flat
from Fancyclopedia 1 ca. 1944
88 Gray's Inn Road, London WC1, England. It is perhaps necessary to explain that "flat" is British for apartment. This science fiction house was established in mid-1938 by the two dizziest Londoners, Bill Temple and Ego Clarke, soon joined by Maurice K Hanson, and continued until after the war broke out, thus being the first and perhaps the longest lived such establishment.

Temple's somewhat fictionalized account of life in The Flat eventually appeared (with other stories included) as 88 Gray's Inn Road: A Living-Space Odyssey (2000). While inhabited by fans this address was for a time the national headquarters of both the British Interplanetary Society and the Science Fiction Association.