Stop Smoking Clinics business. If you like to help people, and maybe if you were once a smoker yourself, you can be of service to others. Business Overview According to the U.S. Department of Health and Human Services, 29 percent of Americans smoke cigarettes. That means a whopping 80,000,000 potential customers for a stop smoking clinic in the United States alone. Even with the assistance of stop smoking aids, such as nicotine patches, gums, and pills, smokers often need...