Perhaps it is because I have a very visible impact on my department or maybe because all decision making is done during office hours. The bar is for play and karaoke - not to talk about work. The company culture treats any work discussion during team outings as taboo. You won't be punished for it but you'll be told kindly to shut up and have fun - work will be back again next Monday. Talk about it then. :)

If I had to guess, that probably plays a huge part into why the company doesn't have those sort of problems.

Many places are not like this.

If you deserve promotion for a non-social role, but aren't because you don't go out with the team, that is not good, but that's a tangent to banning work related drinking events.

Another question is, do you go to non-alcohol related work events?