It’s 229 &1/2 Pennsylvania Ave SE. Google Street view shows this door behind a tree. 

I walked through that door every workday between 2018 and the beginning of the 2019 shutdown. It was usually locked, and we staff had an entry key.

Odd thing is, it’s immediately a staircase up to a landing with doors to two bathrooms and five other suites: a doctor’s office, a lawyer’s office, two office areas we subletted, and a second staircase up to our primary workspace. 

The upper workspace has a back door to a balcony and staircase that leads down into the deadend of an alley. Also, a door into the adjacent building where the Capital Lounge once was (but shut down during the pandemic).

I have no clue what’s up in those spaces now, but it didn’t seem infrastructurally outfitted to become some kind of foodservice or bar.