Its not loser behaviour, I can guarantee you right now every other team in Rugby league SL or NRL would of been out on the beers regardless of the result. If you think otherwise your living under a rock. 

It's the appearance of it that sits uncomfortably with me. A head coach filmed partying like he doesn't give a sh#t after that result is not a good look. But that's my view and we can differ in opinion. 
The article here, shared by Chiswick Wire, is quite illuminating on the contrasting management styles. 
https://www.alloutrugbyleague.co.uk/news/inside-wigan-warriors-las-vegas-1006714

I was never thinking of you at all. It was no jibe at you. Lighten up. After any game the losers should not hide away, even if they'd like to. If you lose you go into the clubhouse/nearest establishment and talk to the opposition etc. It would be wrong not to. I can understand RugbyEgg's reaction.  

It is. I can guarantee had the score and performance been reversed you wouldn't have seen Matty Peet out partying a few hours later.

God I'd be embarrassed to walk down the street, let alone be out on the phish. 

Well , i've only just watched this match & it wasn't as bad a watch as the score line suggested. Ok we were soundly beaten for an hour but while we were trying to go up the middle & with a few individual breaks thrown in   ,Wigan used the outside routes & went round our forwards & let the backs do the talking by taking advantage of our missed tackles. Let's be honest they have some very good players in the positions that matter & young Junior is going to be immense, if he isn't already.