I would have to say... Face to face, with table between.
Every person has this 'personal space' thing. So if the girl lets
the guy invade her personal space, it's like an invitation. The
distance only brings them together. haha... Actually my own
opinion.
I feel that face to face is important, not only to 'electrocute'
the opponent, but it'll be easier to talk. It's only polite to look
someone in the eye when you're talking.