I don’t associate with people who fight in bars, so I wouldn’t know.
But this is a hockey forum, you have used this example before and I still don’t see how it’s relevant.
Before the playoffs started you were hyping the toughness of Minnesota and Winnipeg. How did those teams do in the playoffs?
I don't go to bars (for a variety of reasons - mostly that I never really acquired a taste for alcohol but also I have some health issues where I try to minimize exposure to large groups of people), but there's definitely merit to what JU is saying.
While I never experienced anything like that at a bar, I used to work graveyard shift at a store open 24 hours. It wasn't anything big like Walmart or Target - only 2 or 3 people at most working through the night.
With it being at night, we'd get some people who would at times be unruly. I can recount multiple times when someone would let me know they have a gun, not because they wanted to rob us. But because they weren't getting their way and would (not so subtly) try to escalate. So, you can imagine there would often be times, over the years, when people undoubtedly act unruly.
Now, about me - as much as I'm a dick to people on these boards (though I mostly try not to be - there are only a few people I intentionally act that way towards), I'm a total wuss in person. I was the kind of kid who would get bullied and it took me way too long to stand up for myself. I bring this up to let you know that I am not the kind to actually go out and find trouble.
Anyway, having a manager/lead who was assertive enough to get in the face of an unruly person was definitely empowering. I, in turn, felt more confident to assert myself with people when they were unruly, especially knowing they were working the same shift as me. When I had other leads who would hide or lie and say "David's the boss" because they didn't want to deal with it, it was incredibly deflating.
The point I'm making is that it doesn't even have to involve fighting or violence. Having people asserting themselves or imposing their will against people who are threatening you empowers you into feeling more comfortable taking matters into their own hands.
I'm afraid of making this reference because of the negative connotation, but it fosters a mob mentality. Because someone is willing to "break the ice" and rile people up into action when something is wrong.
Now, do you need an enforcer to accomplish this? No. But if you have multiple players assertive enough to impose their will and challenge the opposition, it is more likely to empower other players to do the same.
Just take Kopitar fighting Burrows in 2012 for example.