I've discovered a good way to make a bedroom divider is to build a tall half wall, leave two spaces between it and the normal wall, and then put in any curtain
Faire Curtain - Store - The Sims™ 3
The Sims Resource - MDP Pastel Green Loft Curtains
Country Mansion Curtains - Store - The Sims™ 3
Mod The Sims - Loft Curtains - 6 Recolours!
TheNinthWaveSims: The Sims 2 - The Sims 3 Movie Stuff Curtain Bed For The Sims 2