Rook assumes that Damian isn't capable of taking down the mooks that plague the bar because why wouldn't have Ulysse asked him to do it instead of getting someone like Rook to handle his business? He has a very specific skill set and he assumes it's why he was hired.

He listens to the break down of the dancing places and then shakes his head. "Why bother with something barely there? You don't want to just be bumping and grinding."

Then the last question makes him huff. Ulysse receives a very poignant look from the fighter. "Do I look like a guy, who brow beats himself into doing shit that I don't wanna do? I'll make you a deal. I'll tell you when I'm not interested in something and until then, you can just assume that if I'm asking for something, I'm interested in it."