My wife and I were bike riding at one of our local trails, and on our second lap, we noticed a gentleman coming towards us on his bike. He was sort of cruising along, and both my wife and I noticed something hanging from his mouth. At first we thought it was the drinking tube from a camelback, but as we got closer, we noticed that he was smoking his pipe as he was cruising along the trail.
Now, that is something I have not thought of trying.
By the way, he appeared to be smoking a Dr. Grabow, but my wife and I were clipping along at a pretty good rate, so I didn't get a great look at the stem logo, so I could be mistaken. I could also smell the aroma from his tobacco for at least a half mile after we passed him.
Both my wife and I thought this was Too Cool.