The password to 'The Regal Order of The Golden Door to Good Fellowship' is "Geronimo."
In the climactic scene in the lodge hallway the costume department used three different suit styles to emphasize each character's traits. Andy wears a modern blue-gray suit with a trim cut, Howard wears a mushroom gray suit buttoned to the top, and Goober wears an old fashioned 20s pin-striped suit with massive lapels.
The lodge appears to have 20 members before Howard joins.
Howard reveals to Andy that he's gotten a joke book in anticipation of joining the lodge. This will stand him well in the near future when he becomes an amateur comedian in episode 27.