Two Secret Rooms. Take Elevator on the right, type "clubhouse", will take you to one room. Take the Elevator on the left, type "clubhouse", will take you to the other room. Depending on what side your on, will determine your destination. Once in secret room, you must step off the node or you will be taken back to main room. This is because the elevator returns to main room automatically. To return to main room from secret room, stand at elevator and type "main". If you are in the secret room and need to call the elevator, stand on elevator node and type "clubhouse", the elevator will return and you can then type "main" to return to main room.
