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... >:)