Looks like I found the equivalent of a Shake Shack burger in Philly - SquareBurger it what they call it. Located in Franklin Square Park just past the mini golf and awesome swing set. And of course you can add this place to the ever growing epic list owned by a Stephen Starr. Surprise Surprise. A “burger shack” selling summer staples: hot dogs, fries, milkshakes (made with Tasty Kakes) and, of course, hamburgers and cheeseburgers.

Opened offically last week for the spring time weather and Summer to follow.
Which reminds me that this happened.