I have only seen Playtime once--in 1975 when I was a teenager living in Los Angeles. I, too, saw it at an art revival movie house (though probably not in 70mm) and remember it to this day! I recall the feeling of having entered a maze, or being lost and dazzled, of thinking how life was like a labrynth and how funny and touching Tati was. I still recommend it to people, especially if you like Fellini. Also, I think the film "After Hours" was based on this film, but the original is far more magical.