Did you get it right?
This old diner has red stools, a lunch counter, paper menus, coffee, pie, and three modern things hiding in plain sight.

The Answer
The correct answer is: The QR menu card, tablet payment stand, and plant-based bacon sign are the three wrong items..
Here is why
- The stools, paper menus, coffee pot, jukebox, waitress, and chrome counter fit an old diner.
- The QR menu card does not fit the period.
- The tablet payment stand and plant-based bacon sign are also modern.
Why people miss it
All three wrong items belong in restaurants today, so they feel normal until you compare them with the old diner setting.
What answer did you get before checking?