Yeah, it ain't half bad. Pull yourself up a glass.

That's what he would say if he could talk right now, and maybe his expression manages to convey the first part. As for the second...

Not far from his chosen bay of massage chairs, amidst the rest of the food court eateries, is the local Jamba Juice. Now he may not know what the hell a Jamba is, but the juice part is clear enough, which would seem to imply that they should have some glasses somewhere.

So, he makes a series of hand gestures pointing, in this order,
to her
to the juice shop
to his glass
to his bottle of booze.

Look, he's not stingy. He'll share. There's a whole liquor store full of drink to try once this bottle's done. Plenty to go around. She just has to decipher the message first--not that he's tried to make it hard or anything. It's not like it's a riddle.