You don't get secondary "guitar-playing, keeping hens, jogging, writing down the numbers on the front of locomotives..." Smoking is different, as has been pointed out repeatedly by several people. It involves putting smoke in the eyes and lungs of other people in the room. A similar effect can be had by setting fire to a paper handkerchief in an ashtray, but for some reason people tend not to do that too often.

If people want to take a quick nicotine fix, use snuff. If they want to blow smoke around, do it outdoors.