Suggest something for me to add to Club Magma!

Creative 3 is dead.
So dead that a lot of the time I'm the only one there playing, but I have a plan to save it.
It needs an attraction, something fun.
A hotspot if you will.

Here's the mostly-finished exterior of the volcano I showed in a previous thread. Looks a little less like someone shit on my plot now :)
It's not that impressive from the outside, but the inside of the volcano holds a secret... A lively little entertainment club!

Naturally-heated hot springs...


A well-stocked bar with cheap booze...

And a karaoke cavern!

But this spot isn't finished yet. There's still a lot more ground room under the plot for more things to do. The problem is I'm kind of stumped on what to add.
I've been thinking of adding either a parkour or a dropper but I'm not entirely decided yet.

That's why I decided to make this thread. Please give me some suggestions on what to put in this unfinished cavern:

If I accept your suggestion, you'll be added to a wall of contributors at the bottom of the volcano, which I guess isn't terribly exciting, but hey, who wouldn't want to be immortalized on a plot in a dead minigame? ;)

Thank you for your help in advance.

 

You could do something like a lava maze or even a lava dropper. (If you want to do mini-games in it)