Many years ago there was a big Hells Angels gathering outside of Niagara Falls to celebrate the opening of a new club house.
After work(11pm) I headed out to the Downer and when I walked in there were about 10-15 of them in the bar. I was going to turn around and leave. One of my favorite dancers seen me as soon as I walked in. So decided to stay. Honestly the bikers kept to themselves and didn't cause any problems.
There was a cop car in the parking lot keeping an eye on the club just incase.
Like everyone says, you don't bother them, they don't bother you.