A customer at a shop where I used to work was an older gent, Mike, who was maybe in his early 70s. He came with us on some shop road rides a few times and was impressively fast. Then we all went for beers after and he disappeared for a few minutes then returned. Turns out he had gone for a smoke, and didn't want the derisive glares he expected to get from the bicycle group for smoking.

Anyhoo, this is just a story to show that there are cyclists who smoke.

Epilogue:

Mike died of lung cancer a few years ago.