We have Diablos near me. Not in my neighborhood. But in my old one. Safest street in the zip code.
When I was in college, I worked at a Bay Area bar (cheap drinks) where the Hells Angels went after their weekly meeting. The Angels didn’t cause problems, but their hangers-on were problematic trying to impress the Angels. One punk hit me on the side of the head with a glass beer mug. I saw it coming and turned my head. He cut open the skin above my right eye. The other bouncers and I took the punk out side and beat him up. The Angels laughed. They were under investigation at the time for murdering a girl, so they were on “good behavior.”
We were sending a message that we don’t want you at our bad. The next week they swarmed to another dive bar.