Remember when they used to have the big halloween celebration in the SF Castro? They cancelled it when gangsters from the east bay showed up and decided to start shooting each other.[1] This is why we can't have nice things in America. You have to charge an entrance fee or have a doorman checking ID and bouncing gangsters at any public nighttime event where you have a lot of gangsters around unfortunately. For example, whenever I go to clubs in bad parts of town they won't let me in if I am wearing a plain color t-shirt if it doesn't have some sort of writing on it.
[1]https://www.sfgate.com/politics/article/9-people-shot-at-Cas...