Marijuana legalization in Colorado put business owners like Dottie Peterson in a quandary. Peterson doesn’t want workers at the staffing service she operates to use marijuana on the job, though she doesn’t mind if they do it in their free time. But she can’t hire drug users because of her insurance. Many companies, including hers, get better worker’s compensation insurance rates by being a drug-free workplace, so the new employees she hires must pass drug tests.