For a while (a few years ago) I had a cubicle like this:
\n ____________________\n| |\n| |\n| |\n| \\ |\n| \\ ____________|\n| A \\ | |\n| \\|____________|\n
I slanted wall "A", narrowing the gap as you went in, just under the threshold of conscious notice (ASCII art doesn't do it justice). But
subconsciously... >:)