Let's Make A Deal, with Monty Hall. I really liked that show back in the day. Apparantly when the show first started, the audience didn't dress in costumes. I was told that one guy showed up in a costume one day, so he'd get noticed and be picked as a contestant. It worked for the guy, and after that everyone started dressing up, and it became standard. It was cutting-edge for its time. I wonder if Monty's still with us..