I help run a club now in my spare time and we have found that numbers
are not affected too much but as we have a large outside area, everyone
tends to be outside if not on the dance floors, (4 rooms)

As we have a 1650 capacity, when the nights are warm and dry, the place
feels empty even though the dance floors are full as people are all outside
even many non smokers.!

Also find that many people have hygene issues that were covered up by
the cigarette smoke... smelly coonts
We now have to use fragranced smoke fluid

From my point of view, all the electonics in here stays cleaner much
longer, which makes my life easier and reduces running costs.

And yes I dont smoke