The Lanesborough Hotel, Knightsbridge, London now has a room named "The Garden Room" which is essentially an outdoors smoking area yet is sheltered and heated and great for a quiet smoke throughout the year. They also have an excellent collection of Cuban cigars in house including some pre-Castro sticks. So if you have time and are nearby it is certainly worth a visit for a relaxing and enjoyable smoke. I find this is a great way around the smoking ban and is certainly worth a try.
Happy Smoking,