Why is JayZ getting excited coming out a room full of kids

JayZ exits a room full of little girls and shares an embrace with Diddy while excitedly stating, "Ooooo, you put that thing on them."

Why is JayZ in a room full of little girls?

Diddy responds with, "You see how we do it here on a Saturday."
Source: https://x.com/areohesseyeee/status/1859791666540052574?s=46