Whatever you do, don't punk out, or you will hate yourself forever.
If this guy was really a crip. I'm not talking saburban USA wanna be crip, but a "i'll fuck you in the ass then curb stomp you then steal your hubcaps" crip, I would honestly take $100 in ones and go up there, throw the money in the air and run my ass off. Those guys are not people you want to mess with, I don't care how much "rep" you will lose. Getting beat to death by a bunch of guys who have no morals or respect for a human life is not worth it to me.