Since Jin had interpreted his 'mission' was to ensure that everyone was dead drunk before he was allowed to return back to the Dungeon Maker, he made the best out of his time there. For the next couple of hours, he forgot about the upcoming problems of his world and enjoyed the party hard.
As promised, He taught them a couple of drinking games and even accompanied General Nubwort who had returned within half an hour to continue drinking for another round. At one point he also sang some Karaoke accompanied by Ke Mi and all the monsters cheered. (Luckily a certain someone wasn't there to film him.)
When the sun came up again, Zhi Nu and the System teleported all of them back to their own home instances. Niu Lang cleaned the whole place up, and Jin had stayed behind to perform some improvements on the adventurer's tavern.