I don't think the smoking ban will have a a major impact on pubs' takings in the long term. People will always want to go out. It may take a bit of getting used to, but I think after a while things will return pretty much to the way they were before.
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It's bingo that is experiencing a major problem as players go outside for a cigarette during the intervals between sessions. It is during the interval that a bingo club will make money from parti games or table-top bingo. This has in the past accounted for somewhere in the region of 50% of a club's revenue. A hell of a lot to lose overnight.
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