All the outlets for the house in one room! 
On one hand, WTH? but on the other hand, if all are wired correctly…then just move on…
2 are installed upside down.
OR, is it 4 upside down?..
add a few power strips…
That was a picture I found and made me curious what the panel would have looked like. LOL
The panel may have looked like any other we typically see.
It’s not uncommon for receptacles to be run in parallel (or series), just not such a short distance apart from each other.
I just bought a 4 foot power strip with 12 outlets for the work bench.
https://www.homedepot.com/p/ProHT-4-ft-12-Outlet-Power-Strip-03201/206858000
What receptacles have you ever seen run in series?
Or the need more lighting circuits in that room:-)
Receptacles are never in series. Nothing would work properly unless there was only one thing plugged into the circuit if they were.
The one thing would still not work because all of the other outlets in series present an open in the circuit.
True. I guess they’d have to go to every other outlet and plug in jumpers. 
They need to keep a supply of these rings on hand.
Great idea, built in power strip.
Never understood why these rings are polarized. Was the NEC involved?
Brass knuckles for electricians? 
