I found this interesting, well designed and pretty funny link the other day while looking for information about love hotels in Shibuya.
The site contains maps for the main love hotel areas in Tokyo including Shibuya, Ikebukuro and Shinjuku (it’s all in Japanese though, but look at the url for a bit of help). The design is pretty cool in a reminiscing kinda way (Habbo Hotel anyone?), and the main attraction of the site to be honest. It’s pretty useful too if you’ve got the urge It doesn’t seem to be too accurate in terms of actual placements unfortunately but google maps is always there to help you for that.
A good one if you’re bored, or horny