Flutter, or sing an aria down these rooms (7)
Again, it looks here like the speaker wants the possibility of a more satisfying life to present itself. Sadly, it just doesn't seem likely.
We wonder. But not well! not for a minute! (11)
Dang. It looks like the speaker is snapping out of it. There isn't time to think about leading a more satisfying life. They've got to carry on this difficult, though ultimately dissatisfying, life and leave the dreams to the dreamers.
We think of lukewarm water, hope to get in it. (13)
There are about fourteen billion more satisfying things on this green earth than lukewarm water. If this is what the residents spend their time hoping for, it's safe to say that they've experienced more than their fair share of dissatisfaction.