The pair of drunk customers were so engaged in their heated arguement that they didn't notice Gregory as he came up to their table. Even though he was told he shouldn't mess them up, he still could intimidate the hell out of them. And that was something he was good at! Squaring his shoulders and folding his arms across his chest, Gregory scowled and raised his voice above the volume of the drunks.
"What seems to be the problem, here?"
This got their attention, along with the attention of innocent people sitting at nearby tables, some who cringed and stopped what they were doing to watch the scene unfold with a morbid curiosity that comes with wanting to see others get their ass kicked.
Before the drunks could continue, Gregory told them, "If you guys don't pipe down, you're gonna have to leave." The way he said it, you had to assume that Gregory intended to personally escort them out.