The context of the following conversation is Alex was the bouncer at the bar that kai went to. Alex allowed Kai to enter even though she is underage.:
Alex says I let Kai into the bar even though she's underage..
The friend responds Were you the bouncer that night?.
Alex responds I was when Kai walked up with her friends.  All of her friends are of age..
The friend responds So you actually card people..
Alex responds Most of the time..
The friend responds You're a good bouncer to know..