I use the $5 shower rooms at NRT regularly. You get 30 minutes, which turns me from a weary traveler into an smirking dork.

The shower room is tiny- I'm not overweight but it makes me feel like a buffalo. With my 20" Travelpro in there, there's no pulling the little vanity stool out from under the counter. Three colored fluids for your hair are provided, I've yet to figure out why one is different than another, and I do enjoy their shampoo and soap. Combs and q-tips are provided individually wrapped.

The room gets a little hot after showering, despite the oscillating fan mounted above the mirror. (turn it on yourself with the Japanese language remote by the light switch.) I usually start sweating if I'm not out of that room minutes after showering.