When making a dungeons consider assigning a % Men value to individual dungeons.
A complex of interconnected cellars beneath a slum used by criminals and outcastes? 90% Men.
The just-unearthed vault of a race of prehuman abominations? 0% Men.
When stocking an inhabited room or determining a random encounter make a check against the % Men value.
D&D dungeons with the monsters Monsters MONSTERS! paradigm is pretty awesome, and makes for a great funhouse, but higher percentages of man-types should allow for more complex and entertaining emergent scenarios as well as emulating a great deal of the source literature.