Rarity works at Hayburger. Not necessarily by choice, mind you. It's just temporary. Very, very temporary. But not the least bit temporary enough.
Pinkie Pie is searching for something. She stops at Ponyville on a whim, or maybe that's the tingly feeling in her tail talking. She decides to meet some ponies. What better place to begin her quest than at Hayburger?
Before There was Magic, There was Still Friendship
Giggle at the Ghostly
Gray Twilight
Hay-oh, Welcome to Hayburger