Any decent pubs in the Marylebone area for pre dinner meet up drinks?

Somewhere with an outside sitting area would be excellent so I can puff away. Don't want one of those places which attracts suit wearing office types on their way home from work....you know, those loud mouthed bores who think they're God's gift to the UK economy just because they work in London.
As I shall be in cultured company certain standards have to be maintained so no Wetherspoon type pubs either please.