Music goof: 'New York Groove'...
At the start of the movie captions tell us that the year is 1974, as they put on an album playing Kiss guitarist Ace Frehley's "New York Groove" -- it plays loudly during the rest of the following scene.
That song first appeared on his solo album in 1978, four years later.
The original version of the song by the UK group Hello was published in 1975, which would still be too late to be accurate, but it's most definitely Frehley's '78 version we hear.
Wouldn't be a big deal if it was just some background music, but it's a pretty obvious goof as the song (and both the turning it on and turning it off) is featured prominently on screen and even plays a part in the dialogue at the end of that scene.
IMDb-boards would be less confusing if people would mark their signatures clearly.