Black and Hispanic Americans are less likely to smoke cigarettes than white Americans. Yet once they've started, they're more likely to stay hooked. National data show they successfully quit only about half as often as white smokers. Black and Hispanic Americans, especially those with low income and education levels, often work or live in places without smoke-free laws, said Stella Bialous, an associate professor of social behavioral sciences at the University of California, San Francisco. Being around others who smoke makes it more difficult to quit.