My flight got cancelled and the one that was rebooked wasn't for another 5 hours! I had the unusual predicament of wondering whether it was better to go home and come back or to hang out at the airport. Enter Airspace lounge.
I always see this place when I'm in CLE (the airport is so small that you almost always pass it!) and I've peeked in a couple times with curiosity, but I never had enough time before my flight to warrant paying the $20 to hang out there (I don't have the special AMEX card that gets you in for free.)
The lounge is small, but modern, clean, and quiet. There are plugs near almost all of the seats to recharge your devices. The $20 gets you free wifi, unlimited tea/coffee, and a $7 credit towards food or alcohol at their bar. Not a bad place to grab a comfy seat and watch a movie on your tablet or catch up on writing some Yelp reviews! ;P