I was 7 in 1977 too and it was the second film I'd seen in the Cinema.
I think that's possibly the ideal age as a really small kid being away from a toilet and too close to loud noises would have given my parents a really hard time.
Sorry, I'm just have a nostalgia moment and remembering when mint choc ices were a rare treat reserved only for the cinema...now they are a rare treat because I can't find anywhere that sells them especially a cinema.