What is the definition of Parties Fluid?

"A 'parties fluid' situation is like a dance-off between friends and a chaotic buffet. One moment, everyone's in high spirits, laughing and joking; the next, it's a food fight gone wrong with half-eaten appetizers and questionable table manners. Now, here's an edgy sentence: 'The parties fluid at the annual 'Who Said That?' gala had guests wandering between questionable choices and questionable boundaries, with one notorious example being a cocktail made from 'forgotten' vodka and 'unidentified' fruits."