The simple answer is yes. In the 1870s, wherever Chinese lived in a community in sufficient numbers there tended to be an opium den (or more than one). The issue becomes a little more complicated when we look at opium use - which is important to keep things in perspective. Most Euro-American opium use was through products including laudanum and other "medications."

Opium dens were initially for fellow Asian immigrants, but they became increasingly popular among non-Asians. Since initially opium dens were not illegal, they occasionally also attracted minors from the Euro-American community, and this resulted in scandals in local newspapers. And this encouraged the drafting of anti-opium and anti-Chinese ordinances, culminating in the Chinese Exclusion Act of 1882 (not to say that opium was the sole inspiration for this bit of racist legislation). Opium served as an effective political leveraging device against a minority population that like most immigrants had arrived in North American to work hard and become good citizens. Racism won the day, unfortunately.

For a good treatment of drug use in the American West, see the work on Sharon Lowe, including her article "The 'Secret Friend': Opium in Comstock Society, 1860-1887," which appeared in a book I co-edited, Comstock Women: The Making of a Mining Community (1998).

edit: I should add as a caveat that I have seen only a few minutes of Tombstone and am unfamiliar with Hell on Wheels.