who owned this private lot?
why do you claim the guard could have intervened? Unless he was extremely close, it sounds like it would not be possible.
did the gang members commit any acts of violence, that night, prior to knocking over your foreign bike?
although adamg's post seems to suggest liability on the bar owner, generally, a single incident is generally not adequate to be considered warning to the bar owner there is a problem that places a duty upon them to act in some fashion.
you said the knocked you and your bike over. That takes but an instant. Just what do you believe the guard should have done? They had already ejected them from the bar.
1. The bar owns the lot. It's attached to the back of the bar (it's a back entrance, not street side).
2. The security guard was standing near us and had his arms crossed. He didn't even say anything to the guy, nor did he try to get in-between
3. I don't know if they committed other crimes that night.
4. They were driving away in their car when one of them decided to get out and start trouble.
5. The guard should have deflected the gang member when he saw him come at me. He just stood there like an idiot.
6. The security guard didn't intervene because he said that the SAME guy pulled out a knife last time.
7. Everything was recorded on camera.
Based on what happened, my 85-year old grandmother could be a security guard. When I worked at a prison, it was my job to intervene. Sometimes I had minor injuries, but I never allowed the victim to suffer unnecessarily. Security is supposed to prevent danger, loss, crime, and damage. Based on the facts, the guard failed to prevent and intervene. He knowingly allowed the SAME guys into the bar because he had no control. He didn't even get the guy's license plate number. A bystander did that for him.