Five nights at Freddy's [duplicate]
Solution 1:
This type of construction leaves the final noun unspecified, but refers to some place owned, operated, or somehow associated with the individual. Exactly what type of place is being referred to will be very context dependent. Here's some examples showing similar constructions, with the omitted, implied noun in square brackets:
I'm watching the game at Bill's [house].
I have an appointment at the doctor's [office].
We're getting dinner at Luigi's [restaurant].