All of them get drunk after complete victory over the bad guys. Narco never woke up and Rai was killed.
Qrow gathers everyone, minus Tai, at his favorite bar in Patch. He gave the owner some money so it's just them. Qrow starts as the bartender. Someone starts karaoke. They all get fucked up.
Ruby - hiccups a lot which makes her giggle, which then makes her hiccup more and so on and so forth. She, to everyone's surprise, ends up drinking Qrow under the table. Also eats an assload of cookies and pizza so she is vomiting all morning the next morning
Weiss - stands up on the bar and starts singing "Bodies" No one can believe she's ever heard the song, much less that she can sing the whole thing.
Yang - ends up on the bar with Weiss and they duet a ton. Sings "Closing Time" as the last song of the night. Everyone, EVERYONE, joins in
Blake - is constantly either all over Sun, or all over Yang. Neither complain. Gets lien from Penny, solely to throw at Yang as she sings.
Neptune - gets super weepy and sits at a corner table. No one knows why.
Sun - gets kind of stoic and stands as as Neptune's bodyguard. Occasionally looks over at Blake and grins, but looks away and goes back to stoic when she sees him
Jaune - super slurry and always seems like he's gonna topple over but never does. Gets on the bar at one point and belts out "Girls Just Wanna Have Fun" Gives Ruby the nickname "Vomit Girl" the next morning just to piss her off
Nora - most of her speech is just gibberish, not able to get her point across most of the time. Fights Silbern at one point, cursing like a sailor. Destroys him. Amazingly, nothing is broken.
Ren - doesn't really drink much, at first. Towards the end of the night he gets super wasted. He gets up on the bar with Jaune and they, for some reason, duet "My Heart Will Go On" before Bronzian sings to Penny
Bronzian - he can't even walk anymore. He has no sense of balance left halfway through the night. He and Silbern get on the bar and destroy "Remember the Name" No one can believe they can rap. Challenges Silbern to a fight but falls on his face before Silbern even stands. The second to last song that night is him standing on the bar, drunkenly, but extremely well coordinated, sings "Never Gonna Give You Up" to Penny. Ruby, to his drunken delight, sings the background parts
Silbern - loud, even more fighty than usual. Loses fight to Nora. Swipes Qrow's flask at some point. He and Bronzian destroy "Remember the Name". He also gets up alone at one point to do "Lose Yourself" then "Rap God." He'd been trying to do "Rap God" for years and this night is the first time he did it flawlessly.
Qrow - no change
Winter - walks in, screaming at Qrow for letting Weiss drink. He shuts her up and she has a few drinks. They go make out in the corner, while a now extremely drunk Ruby and Weiss make out in another corner.
Penny - has everyone's wallets and scrolls, giving money out sparingly, and only giving scrolls for singing. Happy that Bronzian, even in his drunken state, expresses his love for her