When Joan is applying the tourniquet to Guy's right ankle, his pants leg is just above that area. Cut to a tight shot of Guy's face, cut back to a wide shot of the scene and the pants leg is up to just below his knee.
Around 10:30, Betty sits down and puts a beer can on the table. In the next shot, the beer can is in her hand again.
The Scene making use of the Dr. Pepper machine, the drink wasn't available in New York until the late 1960s despite the fact that it was being advertised (primarily)on American Bandstand.