I love meeting corps people in random places!
My school's band/choral program took a bunch of us to a dress rehearsal of an opera at the Met (aka nap time for me- I go to hear the orchestra)... when we had a break for lunch, I went to the little congregation area for lunch, and I was wearing my Raiders jacket since it was cold. Well, my friend noticed this guy staring at us and said hi, and he said "You guys were our rivals!" she thought he was talking about her school jacket until he pointed at mine, so I asked if he marched. Turns out, he was with LVK until they folded. That was cool.