This happened to me in a restaurant quite by accident, my pv was pinching me in my pocket, so I placed it on the table. The elderly hostess of the restaurant stopped by to check on us, asked me what that newfangled thing was for, and when I explained she nodded, smiled, and told me her husband had quit smoking by holding and rolling around a small pencil in his fingers. His motto was "I'm not letting something this little tell me what to do." Cool story, and when I checked out she said if she had any pencils handy she would give me one.
It was kind of embarrassing being the center of attention there.
I waited til I got outside to vape, the restaurant was crowded and I didn't want to start anything with the owners. Now I wonder what she would have said if I had demonstrated for her!