Shirley's World (TV Series) - Shirley MacLaine (1972) - Public Square Street Playground, Yau Ma Tei

The playground scene when Shirley is snapping pictures of the band's singer playing on the slide and roundabout with the local kids was filmed at a playground right next to the famous Yau Ma Tei Police Station. You can see the back wall of the station in the first screencap. The playground is still there but the childrens' rides have long gone and now it is more of your typical Hong Kong-style rest garden (i.e some planters and seats and not much else other than a view obscured by the flyover)

Also quite prominent in the background is the Ferry Point Estate which can be seen in almost its full glory in the lower picture. That waterfront ceased to exist about 20 years ago. It has since been reclaimed and redeveloped.