In the mainstream media and resources, the three main cast are labeled as playmates, even though they are not. They had pictorials published in the magazine and subsequent special editions, but the playmate title is reserved for someone who appeared in the centerfold of the main magazine, none of the girls had that title.
The area of LA where the mansion is located is called "Holmby Hills".
Despite the fact that all three original girlfriends had left the series after season 5 and each only appear as guests in a few episodes each, Holly Madison, Bridget Marquardt, and Kendra Wilkinson all appear on the season 6 DVD set cover behind new girlfriends Crystal Harris, Kristina Shannon, and Karissa Shannon.