We once took a tour of the Palace of the Doge in Venice and were forever changed by the map room. A mural of maps adorned the walls and in the center were several huge globes. Basically, it was the perfect spot for plotting world domination. The grand gesture of devoting an entire room to one theme can be powerful, but does it work for a home?
Moroccan (theme?) room
Maybe if you've got a palace you can pull off a theme room - if you ever get sick of it just steer clear of that wing for a few weeks. In an apartment rooms have to be multifunctional, so it gets tricky. But can a theme room ever work for an apartment? And if not, how do you know if you've taken something from "stylistic choice" to theme?