The shower map has its uses, for example, if it said Gold's Gym 5 miles from my house had good showers, I'd join there. So far, I haven't found any gyms in my area have open showers.Thanks for compiling this I think your Map of Saunas makes more sense than the Open Shower one, all of them are open for business, they offer day pass, they are not private or member-only, so one can always find a way to visit. Hope there will be more submissions in the coming time!
The Open Shower thread focused too much on Western side, most are university/dorm shower, it doesn't provide info on how to get in, any day pass or restrictions. Basically you have to be there and give it a try by yourself, may or may not win
That being said, the only showers listed nearby are military bases, schools, and professional sports lockerrooms.