Many truck stops provide shower facilities for truckers doing long hauls. Whether they're high school gym style gang showers or individual showers, I have no clue.
Ok, so this is how it works with truck stops... namely loves as I can earn mucho points with them. They have individual showers and will ask you at the desk if you want team. This just means that you and your co driver use the same shower for 12 bucks rather than 2 showers for 24. Loyalty points also build shower and drink credits so they're free if you run a ton of miles and burn loads of fuel like I do.
If this genius is driving for a big name company, they generally frown on outside decorating like that, dont want the company name tied to stupid politics. I dont recognize the name of his company so it's probably smaller Full disclosure, I zip tie a Santa to my grill at Christmas and get good feedback and no complaints, looks like hes squished on pretty good too.