It's pretty evident that arguing with him on that won't really get anywhere. So Ginko just gives a quiet hum of disagreement, and his tail thumps against the floor of the deck.

...Shit. "I think you need to stay in a few minutes longer, Joker. Do you think you can deal with that? ...Or do you feel sick?"

If he feels sick, it would probably be best to get him out now, given that he's drunk in a goddamn hot tub.