The scenario: It's early Saturday evening in the middle of a city or large town. You are walking alone to a social engagement and are looking well-presented, feeling good about yourself. You are single. You see a similarly aged very attrative member of the opposite sex walking towards you in the near distance, also alone. They are walking in a calm and unhurried manner, with an air of contentedness about them. They are definitely "your type", in terms of appearance. Like you, they look smartly presented and are probably on their way to a social engagement. The pavement and street are fairly empty and quiet, with no other people between you and the oncoming attrative.

What do you do?