Studio 54 was an icon of the disco era boasting famous celebrities and the best DJs until it's closing in 1979. So needless to say, like most clubs, it had a pretty strict dress code. However, it seems it simply didn’t apply to guests like Woody Allen and Michael Jackson. As you can see in this photo taken in April of 1977, the pop star and filmmaker are so casual and at ease, that they look as if they're ready to pop in a video at home.