SouthillsmuscleFL saidThree hours in Cleveland? Yiks - you are going to be bored stiff... hopefully you will be stiff looking at all the corn-fed midwestern boys. As for Newark, if you have access to Continentals' President's Club... the club located between C2 and C3 has one hot muscle boy bartender.
Yeah, private airline club rooms can be much better than waiting around in the busy terminal. When I flew over 100k commercial miles a year (not counting military aircraft) I'd use my frequent flyer miles to get an annual membership. Mine had free drinks & snacks, self-serve in the smaller terminals, ethernet and/or Wi-Fi connections, decent TV and comfortable seating, sometimes a ticket agent right there.
Ask your carrier if they have any clubs in those airports, and if they offer day rates. The annual fees are high, only worth it to regular travelers. Ask how to pay and gain access, ideally before your trip. Otherwise you might be directed to a ticket counter agent in the terminal, a long wait at times.
Now that I don't fly often and don't keep a club membership, I just find a nice, cozy terminal lounge and have a martini, maybe a light snack. Those links I gave you above can help you find them.
I can easily kill an hour that way, and will sit right at the bar if they have some TV that interests me. I'll strike up a conversation with the bartender, and other travelers around me. It never ceases to amaze me the commonalities I learn about perfect strangers, sharing similar backgrounds, travel stories, etc.
Fortunately for me, having a single cocktail or two, and light food, doesn't cause me a problem on the subsequent flight. Otherwise, eat & drink what does agree with you. ANYTHING but sitting in a vinyl chair in the gate area of your flight.