Party just raises an eyebrow, because that's not shady at all, but he figures he can dig at it later. Cooper doesn't seem like a completely awful person or anything, so it's probably just a normal kin of shady, anyway. It's not like Party's free of shade.

"I think we shall." He tries to imitate Cooper's accent as he steps inside, but it's nowhere close and he giggles as he leads the way up to the bar.