Visiting such a club entitles you to paid conversation with attentive ladies. It seems rather ludicrous but it's popular in the East. Alas it's something SEGA want to incorporate into a coming Yakuza sequel. They're asking for real-life stories and one winner will have their story "built" into the game and their name displayed in the credits.
It's a bizarre competition but we have to admit, it would be super awesome seeing your real-life story played out in SEGA's wonderful Yakuza engine.