How Does It Work?

I'm curious on the whole process.

Do I just walk in Barubola or THC Tokyo and point to what I want as a foreigner? Do these places require to show ID? Since I'm a bit uncomfortable with that such as the online bookings.

Looking in the Shinjuku area. I've been lucky to experience world class Korean NURU so any recommendations in this area would be great too.

A lot of post are out of date so cant tell.