It's tempting to say it's a "keep Austin weird" thing, but I believe in every place there are people with these kinds of beliefs. But perhaps Austin is a more likely place than some others for a waiter to feel free to come to a customer and ask "excuse me, are you an indigo?"
Yes, a waiter -- a young guy, barely over 20 -- asked me this question as I was sitting at a table in a cafe, typing on a laptop, minding my own business. "Huh, I'm sorry?" I said. He repeated: "Are you an indigo?"
Now, I've heard about the so-called "indigo children", but assumed (and still do) that it's just a type of ammunition in the never-ending battle of competitive parenting, my favorite spectator sport. I guess for some parents it's not enough to have their child enrolled in several different sports teams, musical and dance activities; they also need to claim that their child is an "indigo". In fact it's an easier way to one-up other parents: first, it requires no proof (unlike excellence at sports and arts); and second, once you declare your child to be an indigo, any other parent in your circle would feel very silly parroting the same; so whoever says it first, wins. :-)
However, I never heard adults calling themselves indigo; in fact since I gravitate towards rationalists, I would be rather unlikely to encounter such a person. So, when the waiter put this question to me, I was unsure if he meant it in that sense. So I asked "what does it mean?" He said, "it's an... uh, a different person. It's a person with a very strong aura." I mumbled about not believing things like that. He smiled, apologized and walked away. I suppose I could have told him what I thought of auras, which I posted in one of my recent posts. But he was on the job, it would have been not right to keep him away from work.
But damn it, if someone implying that you are "special" doesn't make you want to be on your best behavior, even if for a short while! However, he wasn't my waiter, so if I left a bigger than usual tip, he didn't directly benefit. :-)