I'm jiggy with that. It was almost 2 months ago, my flight got delayed(from DFW) and Dollar RAC cancelled my reservation due to "No show" so had to wait for a next car to be available.

I had been wandering terminal-B/C for a while(about 1:30AM, As I recall) and decided to try one of these to catch a nap there but after an hour, my butt solicited me to go back to the sofa next to the carousel in terminal-B, I obeyed that.

Thankfully, I got a laptop with me so was able to kill 3~4 hours there.
$7.99 for 24hours(wi-fi), IIRC.