I literally said this today, to my wife and I meant “an area exactly like a children’s playground, but suitably large enough for adults to use”.

1. Some sort of sex thing
2. This comes to mind, even though its specifically for dads:

https://digthisvegas.com/

It would depend on the context. If I saw it on PornHub, I’d assume something related to porn. If I saw it in a flyer from the local Parks & Rec department, I’d think it was a standard children’s playground, but for adults.

Simply by itself, I’d default to the park thing.

1. Sex dungeon
2. Cool adventure park with more grown up activities.

A swinger club or a rich person’s dedicated fuck room.

BDSM room.

Somewhere where you break your bones. We ain’t made of rubber like the kids

1. Sex swings, and other Adult adult equipment.

2. See #1

I think the Adult tag has been coopted to mean sex stuff. We did go do ziplines once, that was like a playground for grownups in a way, they don’t use Adult in their marketing.

A regular playground scaled up by 2X in each dimension.

A casino. Or a brothel.

Opium den

Wasn’t there a dark web child pornography site called the Playpen? That was the first thing that came in to my mind.

The destination in question could be very classy or very not, but it definitely sounds like they’re trying to sell it to me.

empty plot of asphalt with trashcan for cigarettes