According to some embodiments of the invention, the convenience of lounge, pool, and patio furniture is increased by providing adjustable armrests that do not require cumbersome adjustments in order to reposition the armrest. According to some embodiments of the invention, an additional pair of armrests may be attached to existing conventional chair designs that have only one pair of armrests in order to increase the utility of the chair, which may be especially useful for lounge chairs, patio furniture, chaise lounges, and the like.