An NHS Blog Doctor article reminded me of this recent discussion point.
It's always unpleasant leaving a pub and discovering that your clothes smell of cigarettes.
However, if the two pubs in Canary Wharf that have become early adopters of the non-smoking ban are any guide, clothes will henceforth stink of stale beer and farts. A colleague of mine likens the smell to that of a rabbit hutch...
Also, all the smokers from the above two places seem to now congregate in my formerly favourite pub, instantly making it completely uninhabitable for non-smokers such as me. I'd imagine their staff are going to kick up a fuss at the fog any day now, and then that one will convert and so on. Until then, it's off the rotation.