They don't stand out to me. Without actually knowing what your story is about I can't write you what I think would be a good summary. That said, I think this one is the best of what you've posted:>Beyond the Lone Digger nightclub's neon facade, Judy and Nick confront the savage heart of their beloved city once more.
It sounds clumsy, which is the only thing I don't like about it. Probably just>Judy and Nick confront the savage heart of their beloved city
would be better, but it's still kinda wordy. If you wanted to go super pared-down you could do>Judy and Nick confront the savage heart of Zootopia
but I'd probably add more to that because it's not much of a summary. For example, if the story is set post-Bellwether you could do>Some animals turned savage because of the Nighthowlers. Others were born that way. Bellwether is gone, but the ZPD knows that monster is a point of view.
Tag Judy and Nick and you're done. That summary indicates at least some thematic analysis of the concept of what "savagery" and "monstrousness" is and suggests a level of grittiness. I think it's pretty interesting, too. You could insert apostrophes around monster to make it read more clearly but I think it breaks the flow. Obviously that summary might not actually fit what you're writing, but I like it as a demo because I think it's punchy and suggestive. Note that it doesn't mention the plot. The plot isn't really important. If you really want to mention Lone Digger you can chuck it on the end in brackets like you did in suggestion 2, or tag it.
But this is just my opinion. I'm not a published writer, though I have written a couple novel-length things that were well-received.