Well, I see jui-jitsu as a sport.
It's not a great approach for street fighting. 1.) if the guy has a friend, you are going to get stomped while you are messing around on the ground, 2.) If they guy has a knife, you won't have a lot of opportunity to see him deploy it and you have little defense to stop it, 3.) strangling a random guy in a bar fight will land you in jail.