supposedly theyre is supposed to have a sword and a gun on the table while the ceremony was happening. John Gotti wanted some of the Decavalcante members to re-do their ceremony because they weren't following those rules. whether or not all of the smaller families around the country did it this way i don't know, but i would guess the majority of them did.
i think the most unique ceramony was Illario Sessa being made into the Colombo family by Andy Russo while they were in prison.