Say hello and in one second look down at shoes and back up. Judgment made.
If your shoes are high you pass. Extra points for expensive, mad, painful and red. Walking boots with mud on and trainers: dismissal.
Obviously if I had narrow pointy feet and didn't have a muddy dog and enjoyed pain or had a shoe fetish I'd join in; but as it is I look at eyes, the whole person and eyes again. Not that I'm deep or anything - I just like other things. As Oscar said, only the shallow don't judge by appearances.