The Cephalopod Lodge is a type of club for cephalopods like Squidward and others. Squidward was a member along with many other octopi, squids, and cuttlefish. It only appears in the episode "Cephalopod Lodge."
It is a brown pyramid with an eye in the middle. The top of the pyramid is light brown and has a very dusty, old appearance as a building.
The inside looks very Egyptian-like with golden walls and golden statues. It also seems to have one central room where initiations are practiced.
The lodge has several practices that are similar to Masonic Practices, such as an initiation ceremony. The ceremony consists mainly of the initiate facing his or her greatest fear, a Moray Eel. They approach the eel and allow it to sting them. Once this is completed, he or she is considered a member of the Cephalopod Lodge.
They dress in red robes with a gold neck-piece and a red gold-lined, deacon-like hat with an eye on it, like the Freemason and Illuminati symbol. They appear to be secretive about their practices, as they expel Squidward from the lodge when SpongeBob and Patrick follow him and witness the initiation ceremony.