When I watched TCM in the cinema it was just me and some other bloke in the screen, it was something like a Tuesday at 2pm so it would be empty. But I personally found it to be very tense and I was a bit of a nervous wreck when I came out. The dinner table scene pushed me over the edge I think haha
I'm thinking it was 1998? I seem to remember going to see Halloween H20 around the same time and I had the screen to myself for that one, it didn't affect me the same way but I do love that film to this day.