"You've got a good start going," Kingsley agreed, taking his time to look around at what Sirius had already done. "I can add a few things, but you might want to talk to Moody or Caradoc about the real big stuff. Both, even, if you want that extra layer." You never knew what would happen in a club, so the more protections in place from the start, the better.
Kingsley started casting a few extra layers of spells, explaining to Sirius what he was doing as he went. They were mostly for Muggle repelling, especially at the exit points, but there were a few for dark object detection, and the like. Eventually, he'd done what he could, and he headed back to the bar.
"I'll take that drink now. Or a bottle, if you have one."