The first but not the original diner, is known as Freddy Fazbear’s Pizza.

This is where it is believed that a man lures five children into the backroom. Due to being caught on camera, the man is caught and arrested the day after however the bodies of the children were never found. In FNAF 2, night 2, the Phone Guy mentions the smell coming from the old animatronics, the smell that got the first Freddy’s shut down.