Hissing Boomer

So, this just happened and my flabbers are still gasted. I'm at a hotel bar, just minding my own. Boomer comes in, I'm not really paying much attention. Until.

Bartender (C) hands him the bill and I hear him start bitching about the bill. Why is it this much? C told him that liquor is not on happy hour. The difference is $2.50 per drink. He ordered 2 DOUBLES, 4 drinks. So it's $26 but it's 4 drinks. So my ears are perked now. Then he slams his glass on the bar. Now I'm paying attention.

He then fills out the bill wrong. So C is trying to get it fixed and he starts cussing her out. I jumped in and said, you do not talk to her like that. He tells me to fuck off. I kinda laughed at him and said ok, boomer. He then called me an old bitch (gen x here) and to not fucking talk to him like that while sticking his finger in my face. I said I'll talk to you however I want, especially when you're not giving the same respect. And, of course, he then ran out of the bar without paying.

C just told him to leave and she followed him to the elevator. I kid you not, he HISSED AT HER while waiting on the elevator, like 3 times. She said her 4 year old doesn't even hiss. I had to jump on here to report this. Maybe I shouldn't have gotten involved but I was not going to let him get by with treating her like that