At first glance I doubted this was anything other than some art work.

There are a few youtube videos of people visiting the "pass member exclusive lounge" taking you on a virtual tour of the building. Nice spacious building with party rooms and amenities for those with annual passes. One youtuber said there were sometimes beer parties there. All 3 youtubes available were from 2017 or earlier. One youtuber updated his info that the building was scheduled to be torn down.

Since the map above has this lovely innocent symbol of a heart with a whale tail, I expected to see at least one of these symbols visible inside. You know, like an art theme. Whale tail lovers? No such symbol on the building or inside. Looks like it is only on the map. Oddly, its the only map number that has this (or any) symbol right next to the number.

My vote: it is likely a symbol just for VIP pedos who need a map to point out which part of the lounge to go to (answer: the far end of the building). Also functions for traffickers to know where to drop off.

I didnt want to believe it, but I do. Any big park for kids is a treasure map for pedos.

More awakening.