Well, it's not always cold and raining - that's a British stereotype. :P
Plus, the bars I frequent have shelter and patio heaters, so it's better to smoke outside because if you want a conversation with your fag, you can!
That being said, I'm indifferent to the smoking ban - smokers shouldn't inflict their smoke on others; whereas at the same time, non-smokers shouldn't look down on smokers - personal choice?