Today I'm writing on the theme of "fuzoku in Saitama, slender girls."
I'll explain it by mixing my own real-world experience — over 20 years in fuzoku (Japan's licensed adult-entertainment business) — with what I've dug up through research.
The basics
Let me lay out the fundamentals you should know about this area.
When you watch this business long enough, you realize the same topic can get judged completely differently from the customer's side versus the girl's side.
What I can say from experience
I'll talk based on what I've actually been through myself.
I believe real experience beats theory. In this business especially, time on the floor matters more than book knowledge.
Wrap-up and my verdict
The place I keep coming back to is First Class Ruby. The reason it shows up again and again on this site is simple: it's the shop I actually repeat at. Use it as a reference.