You're lucky they were probably just good kids having some fun.
Had they been young tough gang members they would have beaten you down and taken your gun away or maybe they would have just shot you and then taken your gun. Don't let a holstrered gun give you a false sense of security, short skinny old bald guys are no match for a real group of young predators gun or no gun.
BTW most places that serve food after four A.M. make their money from the young drunk after the bar closes crowd, not from crazy old insomniacs.
I'm a gun owner and lifelong NRA member and what you did was stupid and wrong. You implied a threat and created a situation where you and/or those kids could have lost their life.
You should be ashamed of yourself. You acted like a bully just because you had a gun.
How in heaven's name would you know this? Big assumption..... Not everyone carrying is an idiot and untrained in the proper use of firearms in self defense.