Well, guys, I've finally decided! It's taking place at Sugarcube Corner!
Chapter 10
There in Pinkie Pie's bedroom in Sugarcube Corner were Rainbow Dash, Fluttershy, Pinkie Pie, Rarity, and her pet alligator Gummy.
Applejack knocked on the door, and Pinkie opened it.
"Hi, Applejack! Ooh, you brought Twilight! Come in!"
Some of the ponies were sitting on Pinkie's bed, while the others were sitting on beanbag chairs.
Applejack sat on the floor, and Twilight sat on a beanbag.
Pinkie was on her bed, with a whiteboard and markers. She had 'Big Mac's Birthday Party' written at the top, and some categories underneath.
"So, Applejack, what do you have planned?"
Everything was set. Now, all Applejack had to do was find a way to keep Big Mac none the wiser.
Only one way to find out where this is going!