We went last night and had a blast as well! There were only about 30 people in the theater, but we sang loud enough to make up the difference!
Also, this was the first time I had seen "Beauty and the Beast" on the big screen and the animation was stunning. I was so impressed with the backdrop painting.
They are having a Sing-A-Long Sound of Music in the same theater in October. We are so going to be there!!