The Scavengers - Vince Edwards (1958) - Astor Hotel, Tsim Sha Tsui

Marian (Carol Ohmart) is staying at the Astor Hotel. We know this because we are told by O'Hara at some point in the story. The film did use that very hotel as well, although you never really see the name properly despite it being emblazoned across the main entrance to the hotel in neon light.

The hotel was located on the corner of Carnarvon Road and Cornwall Avenue. Sadly the latter street was obliterated when the K11 Masterpiece was built and there is no physical trace of it anymore, other than an open, nameless thoroughfare alongside the skyscraper where the street used to be.

In the first two images below Vince Edwards is standing on the corner of Bristol Avenue,with the hotel entrance on the corner of Cornwall Avenue. Carnarvon Road runs along left of frame where the cars are lined up.

The hotel makes a final appearance at the end of the film and although Allison's arrival there looks to have been filmed on location, his departure soon after (right at the end of the film) looks to have been filmed on a set.
 

International Prostitution: Brigade criminelle - Jean-Louis Broust (1980) - Cornwall Avenue, Tsim Sha Tsui

The chase continues, this time down the now defunct Cornwall Avenue. I've mentioned it before but for newer followers, Cornwall Avenue fell victim to the redevelopment of TST to make way for the K11 Masterpiece skyscraper. A whole block was razed and the whole nature and vibe of the place was completely transformed. The space that was Cornwall Avenue still exists, more or less, but it is now a nameless, covered thoroughfare that runs diagonally along the southwest side of the aforementioned K11 building.

Love in Hong Kong - Pauline Teutscher (1983) - Cornwall Avenue, Tsim Sha Tsui

Here's a place you will have a hard job locating on a modern map of TST. This is the view along Cornwall Avenue looking north (well, strictly speaking,it would be northwest because that's the direction the road used to lie on). There is a glimpse of the former path Cornwall Avenue used to take on modern maps if you look on the west side of the K11 Masterpiece in TST. The diagonal line to the northwest made by that side of the mall was dictated solely by the existence of Cornwall Avenue, and even though the mall didn't build over the road per se, it was included in the redevelopment and is now a nameless, covered, pedestrianised pathway. You can see the same view in this photo over on Gwulo.com, albeit a decade earlier.