I was at the casino when they filmed, I understood that the film crew turned up on a sat night and the crowd was crap so they came back on a Fri oldies night, the first shot of the inside of the casino which you would think was the start of the night in in fact the end of the night - it shows Derick Mead (bisley) and the Aldershot coach lot getting ready to leave and head off south.
Every time the lights went on its true some people left the floor at least _30% or ran for cover up (this use to be called cracking up) to Mr ms - I was unaware that it was knowledge that they were filming that night , we just turned up, first thing I knew was coming in the door and a blinding light in my face - I can also be spotted in the outtakes in the record bar with the cap sleeve t shirt and flat cap on looking over someone's shoulder's at records, I was also right off my face, but look how controlled I was chewing gum - love it