I don't travel much, but I had a great one when I greeted a client one day who was with a staff member. I greeted the staff member by name and I said "Hello Brother" to the client and the staff member said "Hello Brother" to me.. I actually did not think much of it, as often folk call each other bro and brother, but there was the odd usual masonic word slipped in as we spoke around this staff member in the usual "code" which would just slip by others, and the staff member said "Hey! I'm a Freemason too!" I never knew.. he was in a lodge I used to visit and we had mutual friends...
In the same vein, I had another client who sat me down and proceeded shower praise and say how honest I was, what a great job I had done with diligence etc etc and then he said "There is something you don't know about me, I am a Freemason, and I was wondering, (pause) .. would you be interested in becoming a Freemason?" It came a bit nervously out of him. I looked him in the eye and said "No, I don't think I am interested in joining Freemasonry"... in his eyes I could see him surprised and the thought "How do I back pedal out of this!" in his eye. And I cheekily smiled and said "That's because I am a Past Master". We both had quite a laugh
I am sure other brothers will have good stories about meeting Freemasons on their travels though, like you, I'd love to hear them