Yes I see the touch.
It starts with voyeurism. Women coming down stairs and the angle is looking up at them, so there's a clear shot of their legs, foreshadowing what we are about to see and first making the film viewer a voyeur of the women. Then there is the front row of mostly men watching the women dancing, heightened by the man using binoculars panning up to one dancers figure, and later through the monocle.This voyeurism is seen in his movies like Rear Window and Psycho (I wouldn't be surprised if it's in most of his movies).
When they track across the mostly men in the audience, the viewer is giving insight into the psychology of the characters through their facial expressions and body language. We see how each individual mans feels about this act of voyeurism. The track shot ends with a nice comical moment of a woman sleeping in juxtaposition to the men.
Then there's the attractive blonds using sex to manipulate a man, when the old guy goes to talk to the show girl. This also sets up a funny moment when she gives him the lock of fake hair. Eva Marie Saint's character did this to Cary Grant's in North by Northwest. In both film the man is arguably much too old for the younger woman.
Finally we see the two thugs and in insert shot on the woman's purse. Like in a lot of Hitchcock's movies the viewer of the film knows something bad is going to happen to a character, but the character does not know, which builds suspense.
