Some of the smoking area solutions are quite cheap at £4 - 6k

And others won't cost a single penny.

What real effect? It'll mean I'll be able to choose where to drink in a pub without having to hunt out some relatively smoke free area.

And it's not just pubs of course. There's a little coffee bar I like because it's friendly and makes the best coffee and doesn't overcharge, and it doesn't feel like a Starbucks clone. But more often than not it's got some berk sitting at a table just inside drifting smoke all over the place, so I go elsewhere.