I just found this very interesting photograph on
eBay
It's a rare look inside the Twin Barrels Drive In in Los Angeles.
eBay
The Back
As a reminder.
(I believe this has been posted before)
old file
Twin Barrels 1010 East Slauson
And here's an exterior view, that we might have already seen, from
gettyimages
" The Twin Barrels drive-in restaurant near Los Angeles - 1939 - Photographer: Ewing Galloway."
gettyimages
BUT...
and it's a big but 
, if you look closely...this doesn't appear to be the 1010 East Slauson location.
Take a look at this.
DETAIL
To the right of the car you can clearly see that the street address is 1227
*...and
not 1010 East Slauson.
It's a mystery!
.........................Get busy minions!
* The street number is 7227 not 1227. (thanks
GW)