Buffy knocked on Giles door. It may have been after midnight, but he was her Watcher, and she needed some Watcherly advice right now. So, she came straight to his apartment after finally slaying the green demon, to find out what the deal was.
There wasn't an answer right away, so she knocked again. 'Hmm. that's a neat percussion. like a skull, but different. bouncier.'
She began to patter tunes on the door, hitting different places, to see if the sound differred in different places on the door.
Giles stood there, rubbing his chest. "Yes, Buffy? Something I can help you with?"
"Ooh, Giles, yeah. I had an encounter with a new Demon, wanted to get some know-how about it. See, it came out of a swirly-thing, like a sideways toilet bowl, but with color, not water, and it was acting mean, so I cut off it's head. But instead of dying, it just put the head back on, and then it grinned at me, and you know what it did? It called me a cow! Me! So, I had to slay it. but it took, like, forever, at least 3 minutes, so I was wondering if you knew a better way to kill it?"
Giles blinked at her for a moment. "I'm sorry? You did kill it?"
"Well, yeah, but I saw a flash of light somewhere else, and saw another one going into a house nearby. It was an empty house, so I was able to kill it quick and quiet, but it took forever again. So, you're the Watcher-type person, with all the know-how and killing-type knowledge, so I need you to tell me the best way to kill it."
"Very well. Come in. Come in. I'll get dressed and you can tell me a bit more, I look it up."
The group of little blue men, with orange and red hair, wandered through the town. They didn't encounter any more of the green demons, but did find and kill a larger one with tan skin and horns on it's head. Strangely, it kept blowing it's nose at them, only hitting Wee Marky, and he didn't die, just got knocked out. They might have found it odd that the Hag they were tracing was going near so many flowers [most of which they even left alone, they were so focused on their mission, now that the adrenaline had gotten a chance to wear down]. They might have found it odd, but they figured she was a Hag, and Haggin' wasn't something they understood.
They finally stopped in front of one of the dwellings the big-jobs lived in. Now, three of the Feegles present knew how to read. But, really, none of they were looking to use that skill at present. And, even if they did, they wouldn't understand anything special about this place. They didn't know how to figure out addresses. Even if they had, they had no knowledge of this dimension. They were just looking for the 'Hag'.
So, the fact that the address was 1630 Revello Drive would have meant nothing to them.