I'm more intimidated of LEO's than gangbangers ! They seem to always want my family's money and have radios.
Doesn't matter. My CWP instructor told us, "If a guy comes at you with his fists, you gotta assume he's Joe Lewis. If a guy comes at you with a knife, you gotta assume he's an expert, including throwing it. If a guy comes at you with a gun, you gotta asume he's Wyatt Earp." In other words, NEVER underestimate your opponent.
A lone bager doesn't intimidate me in the least. They're at my outdoor range a lot. Demeanor & body language tells you everything. A crowd of bangers may make me want to clear out of the area, mob mentality. Even if you can spot the leaders, the odds are still grim. Better to slip quietly away.