Similar to stick on curtain rods, command hooks are another answer to how to hang curtains without drilling into the wall.

Hang curtains from ceiling without drilling. Hanging curtains without drilling is a great way to save time and money. Like command strips, they work by sticking onto a surface like a wall without creating damage by drilling. Use curtain clips to hang curtains without drilling.

The benefits of hanging curtains without drilling. In fact, they even make some.