Been in county jail in Tennessee a couple times. Two different counties.
In the first one there was a guard in the pod of 100ish inmates at all times. It was very boring. I read any books I could get, mostly Western cowboy smut like Slocumb to my dismay. I got a Quran once from some Black Muslims, that was interesting. Worst thing that happened in that jail was getting collaterally teargassed when an old guy wouldn't get off the phone. I was in there during the Super Bowl once though, that was actually pretty fun.
The other jail had smaller pods with no guards. Maybe 30ish people to a pod. No nurse on staff and a busted AC. One dude was withdrawing from heroin and booze and kept having seizures, they'd just move him to a different pod with AC for a bit. I made a paper chess set and we played cards. The bullies ran the TV so I had to watch that godawful American Sniper garbage one night, that annoyed me.
The second jail was where I detoxed from my last drink. It's been like 9 years or so now.