Abstract: An entertainment structure principally intended to comprise a cinematic auditorium. The structure has a horizontally disposed floor or decking support plate on which seating for members of an audience is arrangable and support means on which the support plate is rotatably mounted. Orientation varying means are operable to tilt the support plate, from the horizontal, in a required direction; while drive means are operable to rotate said support plate on said support means about an upwardly extending axis. The structure also includes a drive system operable to actuate said orientation varying means, and control means operable to control actuation of said drive means and said drive system for varying the angular disposition and tilt of said support plate with respect to said axis. In presentation of a cinematic programme, viewers perception of the action is enhanced by such rotation and tilting being synchronized and in concert with visual and aural action of the programme.