"Nchala" (إن شاء الله) is one of the most ironic words in Arabic. It means "If God wills it." In a secular, acid-fueled context, "What shall we do at the party? Nchala..." implies a passive, fatalistic shrug. It suggests that the events of the night are predestined—or so chaotic that they are out of human hands.
“Wain el hafla? Hmm!”