The concept was great, the venue was very nice and parking was convenient.
In the future a sing a long should entail more than watching a movie and singing along to it.
The only interactive part was when we sang with the host singer to a "Moana"song, for the warm up.
We brought our Grandkids ( 10 yr's old and 7yr's old ) and half way thru they asked us to leave saying, "Grandma we've seen this movie several times and all we are doing is watching it again."
I had to agree with her. We paid a lot of money to go to the movies, and sing to the songs, while we watched on a not so big screen.
We left at half time.
In the future, it would have been better to have had the host lead the singing and silence the movie in the background. You also might want to start at 6:00 not 8:00pm, since your audience are children.
Good luck with the next one.