A rotatable banner support assembly comprises upper and lower plates spaced by at least one spacing fastener and each defining a passage for circumscribing a support member, a plurality of brackets mounted on one of the upper and lower plates to frictionally engage the support member at least one of the brackets being radially adjustable, and a rotatable annular disc disposed between the upper and lower plates and circumscribing the at least one spacing fastener, the rotatable disc configured to retain a banner arm.