There was this episode in Batman Beyond, which starts off with a bunch of people stuck in some anti-gravitational bubbles, dreaming about a great life (I remember one girl was dreaming of her boyfriend asking her to marry her, and this one dude was dreaming about being a rock-star and all the celebrity that came with it). They were like some sort of junkies, dreaming of a good/better life, hooked up to a simulation machine.
If I remember correctly this whole scene is set in a sort of a shady cellar and I believe it is the Joker who is behind this whole setup.
Anyway, I would really like to watch this episode again, for inspiration in writing something related, but I can't remember which episode it was.