For CC to work, you would have to have already drawn your weapon and you'd have to be rotating around in a circle to keep a 360-degree eye on them.
There are always potential situations where you can be taken by surprise, but most of the time you can see them coming. Anytime I am approached by a group of young toughs my awareness notches way up. Usually I find some way of getting outside their line of travel and force them to make a turn to intercept me.
Either way, if you are aware you can start sending the signals that you are not going to be caught off guard. They are looking for an unsuspecting victim, not a fight. Especially an armed fight. Make a point of observing them so they know you are doing it.
Avoid blind corners and ambush points.
Not everyone *older* is the *Epic Beard Guy*
GMTA. Blind corners are especially dangerous, so they must be turned wide, with plenty of space.