Get a headset and pretend to always have a skype convo.
I have a pair of small open headphones (skullcandy icon), that way I can pull them forward to listen in on the office chat when needed. I’m also not totally unreachable if someone was to shout my name. It can be a bit annoying not being able to get attention of someone with plugs, but in those cases we get to throw stuff at each other so it’s all good. Keeps the morale up.