opium den (noun)

1. During the late 19th and early 20th centuries, opium dens were quite popular in major cities, especially during the opium trade between China and the Western powers.

2. In a dystopian future, where opium dens are legalized, people spend their days in opium dens hooked up to virtual reality machines for their entertainment.

3. In the animated series, the main character accidentally stumbles upon an opium den while searching for a hidden treasure.

4. The opium den was decorated with ornate Chinese elements, dimly lit by lanterns, and furnished with reclining couches and low tables for opium enthusiasts to relax and indulge in their habit.