They aren't talking to each other or looking at each other, both of them were watching me like hawks. Finally one of them stops at the back of the wash bay and the other stops at the front.
Car washes are prime areas to be robbed- most people are alone and not aware of their surroundings due to the loud sounds.
Well done.
The first step in my world is to look a possible problem right in the eye - no challenge at all just a dead expressionless stare that lets your possible opponent know they've been spotted and they don't have the ability to take you unawares. That will put most of them on their guard and have them starting to wonder.
I totally agree, the "look" is half the battle. You could walk around totally unarmed and defuse situations with your body language alone if you know what you are doing. The problem is, most suburb folk don't have enough experience with this. I only picked up on this after working with juvenile delinquents for a few years.