Another great airport. First of all they have free WI-FI. You'll most likely run into me in the Airside Building which houses a good number of eateries and shopping stores. The mezzanine level also has a chapel and meditation room. If smoking relaxes you, you can patronize one of the bars which has a smoking section.
Now if you need to take a shower, you are in luck.
Pittsburgh has an airport health club located on the lower level.
For $10 bucks, you can feel rejuvenated with a nice hot shower. Isn't that refreshing? ;)