My favorite gerrymandering story was when I learned an ~800 student local college had been split down the middle, so students were in different congressional districts depending on their dorm building.
Also see: Nashville, Tennessee
Like your dormroom example, ATX is very progressive.
I actually made jigsaw puzzles to advocate against gerrymandering. They were difficult to solve! michaeldnahas.com/doc/jigsaw_puzzle/index.html
It's much worse, now.
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The fact that there are non-contiguous US Congressional districts (e.g. TN's 2nd/3rd have inholdings within each other) makes the entire process even sillier.