ScoutandAtticus - Yanbu. DH and I moved indoors yesterday at a pub due to this. We just wanted to eat our lunch in the sunshine but couldn't stand the minging smell of second hand smoke. Yes it's legal, bit that doesn't make it right. Anywhere where people are trying to eat or drink should be smoke free. The joke of it is, the pub garden is opposite a green so making the garden smoke free bit offering somewhere for smokers to go would be easy. It amazes me that such a selfish and intrusive choice , never mind health risk to others , is still tolerated anywhere.
Right, and how often do you visit the pub?
Pubs used to be where working class people went to drink beer and socialise. There used to be loads of them. Even the tiniest village would have 2 or 3 doing thriving trade. They were not only businesses and leisure venues but local landmarks, many of which had been there for hundreds of years. You could trace local history through their names and locations. They were a huge part of our heritage.
Then you got your smoking ban.
Things had been bad for a while because of alcohol duty and brewery contracts but the smoking ban was the absolute death knell for the industry. Do you really think pubs can survive on the custom of nice MC families who visit maybe three times a year for lunch (and barely buy any beer) because a) the sun has come out in the UK
b) they're not working and c) they're not abroad (probably surrounded by smokers but not minding a bit because it's all just part of the vibrant local culture)?
Meanwhile, the people who used to go to pubs are now mostly drinking at home. Lots of them are smokers. Some still smoke indoors around their children. What a win for PH, eh?
I can just about see people's point with cafes - they are primarily places to eat (although very few had outdoor seating before 2007 - the spaces you're whinging about were put there to retain smoking customers and are maintained throughout the year for the same reason) - but pubs? 
It's cultural appropriation. You've taken something that wasn't yours, moulded it to be more acceptable to your tastes and in the process excluded the people who built it in the first place. Now you want to mould it further because it's still not quite how you'd like it.