I was finally able to find out what these are. Turns out they’re “water pipe curb boxes” that allow someone to gain access to the main shutoff valve for the building. Not a good place to try and tap into a water source!
Ask the property manager where the spigots are if any at all. A lot of times they have to ask the engineers . Someone has to know .
Sometimes there inside
I brought this up to the manager. She thought it was pretty funny and said, “yes, there are other water sources besides fire hydrants. lol!” And that the grounds guy will show me where to connect a hose.