Can you say "only in Japan"?
Here's a video of one of the girls happily wasted, dancing and singing away. The stumbles and staggers are really well done!
The game is called Dream C Club and the official website is here. In the game you date a variety of beautiful anime girls and get them wasted. It's right up the intoxication fetish alley.
For more screenshots of the girls guzzling and dancing, visit here.