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Many states and cities in the U.S. now have anti-smoking laws in restaurants and bars.

But bartenders and servers in places that don't have such restrictions can still be forced to involuntarily inhale patrons' tobacco smoke.

"It's been well shown that secondhand smoke significantly increases the risk of heart attack," says Dr. Grogan.

Good ventilation systems can help. So can lobbying your legislators to change local rules.

(Getty Images)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.

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