KOE on Fat Tuesday. Originally known as the Krewe of Elvis, the KOE is a Mardi Gras parading organization that consists of members from around the world who meet in New Orleans each year for Mardi Gras. What started out as a social network in disguise of a Mardi Gras Krewe has now grown by leaps and bounds, but remain true to the spirit of Mardi Gras.