A seat includes a seatback and an armrest supported by the seatback. The armrest is rotatable relative to the seatback to a deployed position. A swing bar is supported by the armrest and is rotatable relative to the armrest to a downward position. The swing bar in the downward position is elongated downwardly from the armrest. A drive belt is indexed with the armrest and the swing bar to rotate the swing bar to the downward position when the armrests rotates to the deployed position.