Mouth and throat cancer? Gum disease? Tasting like an ashtray? You don't avoid any of that.
Also, if your intention is purely to fit in in a social situation, it may well be noticable that you're not really inhaling. Try sucking a little air into your mouth without breathing in; it's difficult, isn't it? And then you'll only be breathing out a tiny volume of smoke.
You have a golden opportunity not to smoke, so take it. No-one at all starts out thinking that they'll become addicted. There are other ways of being 'sociable', and the smoking ban will probably have reached England by 2008. Standing outside a club in the smoking enclosure, freezing your arse off, is not particularly fun.