Bull huffs a laugh when he realizes it's Beau. He fills her other cup obligingly.

"Hope you don't plan to end up passed out under a table any time soon. Night's still pretty young."

As far as he can tell, she's human. But he's met plenty of humans with impressively resilient livers, so it's entirely possible that Beau has a ways to go before she's wobbly. Or, she already is and is good at playing it off.