It looked to me that at least a vast majority of the house right section of seats were filled with people who were deaf. They were signing to one another prior to the show and during intermission etc.
During the show the people who were interpreting where in the front row which only had three seats. The three of them sat there and got up as need be to sign. They were not on the stage itself, but they were standing directly in front of it.
Someone that I was sitting next to was a little annoyed by this wonderful service being offered to say the least. He made a comment to the person he was with about how they should do it better to not distract the entire audience with this. As if he felt like it was a group punishment. Furthermore, when it came time for everyone to leave. I knew that I couldn't kindly ask someone to get out of my way like I normally would due to the fact that they couldn't hear me. So, I waited.
"If you try to shag my husband while I am still alive, I will shove the art of motorcycle maintenance up your rancid little Cu**. That's a good dear"
Tom Stoppard's Rock N Roll