I also hate the site of cables.

There are too many ways to mention:

At home, I lifted the carpet and pulled back the baseboards and have black PVC (4") tubing (looks like one of legs from the desk) and black heat shrink/wrap tape.


At the office, they (the other staff and owners) do not mind the cluttered or rat's nest look and do not want to spend any time or money on the matter, so I simply duct-taped the cables to the desk and etc.