If I have to be in a waiting room longer than 10 to 20 minutes I will bring a tablet or a good book with me.
Most waiting rooms will have free WiFi where I can use my tablet to watch Youtube videos and before I know it an hour has passed by in what seems like 10 minutes instead of the hour.
Without anything to do or watch in the waiting room and just sitting there an hour can seem like 4 or 8 hours especially if you constantly look at the clock.
Some waiting rooms have televisions that you can turn the channel and watch what you want to watch but some you have to watch whatever is on the TV.
If you're waiting for someone in the hospital then you might want to step out of the waiting room for a bit but if you're waiting for someone then you can tell the desk receptionist that you're stepping out the door for awhile in case a doctor needs to talk to you or if the person you're waiting for gets admitted or is leaving the hospital.