They Think They're Just Stupid Kids Who Got Mixed Up In What They Thought Was A Normal Party - Tumblr Posts
Assuming that Danny's team is also there (Sam, Tucker, Jazz, maybe Dani and Valerie), the ghosts also decide to dunk them after they get Danny in. Each one changes the flavor of the Pits. They also get super drunk from the Pits but don't have the same issues as other humans because they are all some level of liminal due to being exposed to ectoplasm over the course of their lives.
At some point it turns into everyone throwing each other into the pits to see how their ectoplasm changes the flavor. Pure drunk shenanigans at this point.
Then someone suggests they start throwing the League Members in.
(Taking suggestions on what everyone tastes like. Would it be booze flavors or anything in general?)
The League of Assassins hideout with the Lazarus Pit has been attacked, with many members suddenly going silent. Of course, this fact makes its way back to Batman.
When the Justice League arrives to figure out what is going on, they find a group of 'metas' throwing a party, all of them with cups filled with Lazarus Water.
As it turns out, the Lazarus Water is actually high quality ghost booze, and a group of specters has decided to set up the current Ghost King's wedding reception around the best source of it.