Green’s Dictionary of Slang

(US black) a party.

2012		Urban Dict. 25 June 🌐 kiki A party including good music and good friends, held for the express purpose of calming nerves, reducing anxiety and stress and generally fighting ennui.
2022		J. Hannaham Didn’t Nobody Give a Shit 164: [W]e was more often, out at Sound Factory or The Tunnel, havin a kiki on the piers.