Beds have to be good for more than just jumping on, right? I think it would be excellent if the beds in houses and towers could offer a "Power Nap" option, along the lines of meditation. You could snooze for a period of time and gain energy and mood incrementally as you slept.
You could also dream: every once in a while when you took a nap, you could be whisked away to a dreamy mini-game and grab IMG quoins, or have a weird dream like the bureaucratic water quest, or even an incoherent dream along the lines of Le Voyage Violet. These would be good for picking up a moderate amount of IMG.
The cooldown timer on naps could be "Can't sleep, clowns will splank me."