Welcome to Naibu no Ken (内部の兼 = cum inside), a Yakuza run Love Hotel!
Each room has a cute little theme and a nice, neat price tag to go along with it. Swipe your card at the door and enter your own personal paradise for either 1 hour, 2 hours, or all night; it's your choice.
Every alleyway and corner nearby is staffed with the services of the lovely prostitutes who will do their best to coerce you into a few hours at the Love Hotel instead of a little something behind that nasty dumpster over there.
Come on, you know you'd like to cum in.