Also, coincidentally, our lead singer, started our set by ringing a bell for "peace and love." It kind of gave our whole set a sort of "spiritual" feel. After the set, people came us and told us that our songs really "touched" them. Our band was in fine form, definitely one of our better outings, but the response from the audience was truly unique.
I do think the blind members of the audience totally changed the vibe of the room. We were more focused on our sound, and it permeated the room. All in all a powerful performance. And a powerful audience. A real communion. Remarkable!