I'm surprised they didn't show their appreciation on the first night it was built. Even if just 1-3 he'd still have plenty of energy left over, and from everything said/done I don't think anyone would have much of an issue with it.
Oh well, I still imagine it'll come up at some point, it does have the harem tag, and Sakura certainly doesn't seem against it provided he still treasures and energizes her on the Rev.
Anyone who reads the novel(s), was this any different from the event described in it (or either, idr if their was a ln and a wn or just one or the other.)
Oh and BTW, I'd say it probably has a 'basic' hostess club type setting to start (maybe on the first floor or in the 'main' section of this floor) followed by the option to have access to more expensive nightly services as well.