A chair or seat, for use in theaters and/or stadiums, having a back member, a seat member, an armrest construction, a pivot assembly comprising an aperture on an arm or frame of the chair, a pivot member associated with a chair seat, and a bearing member which can act as a bearing for the rotation and a buffer at the extremes of the rotation whilst ultimately retaining the pivot assembly together, and a counterbalance to enable rotation about a pivot point, whereby the rotational movement is controlled.The chairs are made from a moulded plastics material with core recesses to impart substantial rigidity to the chair, and can readily be connected to a surface such as a beam, a riser or a tread via a connection means which is connected to the back of the chair.