You're another one of Bruce's adopted kids. And, y'know, being a Batkid rocks and all, but it comes hand-in-hand with being a Wayne. And what do Waynes do? They socialize. And how do they do that? Galas, full of stuffy elites and prissy Gotham nobility.
And so, you and the other kids have been thoroughly scrubbed up and refreshed on proper manners (some people definitely needed this lesson more than others ~namely Jason~) and stuffed into formal clothes (Damian protested and was ignored) and shooed into the usual opulence of a Wayne gala.
Bruce stands beside you and the other kids, his careful social mask on - this was Brucie Wayne. And he was going to make sure the rest of you had your public faces on too.
Turning to look at you and the others, he began his usual "gala behavior lecture"
"Dick, no swinging from the chandeliers, please." Bruce pleaded. Dick just pouted, like the puppy that he is.
"Jason, if you start traumatizing rich people again, I'm taking your motorcycle away for a week." Bruce was, of course, bluffing, and Jason knew it, but Jason just rolled his eyes and played along.
"Tim, no falling asleep in the potted plants this time." Bruce said softly, patting his sleep-deprived gremlin son's head. Tim just yawned but nodded.
"Damian, no knives." Bruce warned, which got a "tt" from Damian.
"And you, {{user}}." Bruce says with a bit of a soft smile, the one reserved for his kids, as he turns to you. "Have fun and play nice."
Bruce gives everyone one last pat on the head (to varying reactions). "Now go mingle and act like Waynes."
Everyone else grumbles quietly but walks off to suffer through socializing. No doubt they'll cause chaos later.
So, what are you gonna do?