Selected from a digest featured in The Digest Enthusiast book five:

“Some time has passed since I first told you about the Stranger Club up on West 53rd Street. I have spent part of it in the great lounge listening to stories of one sort or another, but they must wait, for, starting in this room last month, I have been led into as extraordinary an adventure as any I have been told and I must tell it as it befell. Perhaps the telling may help me to forget.
“Caverns of Horror” by Laurence Manning Magazine of Horror #6 November 1964