The Crack House is in Gangland and it shows as "ch" on the map. This is the other place where crack addicts dwell besides the crack mansion. You could say it's more luxurious than the crack mansion since it has a yard and also a cool front door! It's locked though, so you'll have to use your noggin to figure out how to get in.
The Crack House is built out of two main areas. The house and the outer yard.
The outer yard has crackfiends and crackheads moving around. This area works perfectly well for killing stuff, so you don't even need to get inside the house to grind. If you do want to go inside, there's a locked door blocking your way. It shouldn't be too hard to figure out how to get past.
This is the first floor of the crack house. All the usual features of a crackhouse are found here, such as ruined furniture and angry crackheads.
This is the second floor. This is where you can find a couple of bedrooms and a bathroom. Nothing exciting sadly. Or is there?
The Crack House is a bit different from the crack mansion. There are a lot more crackfiends and it's generally less crowded than the crack mansion. This makes it a pretty good place to get some experience and money (early on) if you have the contract for that. Feel free to do exploring since there isn't anything big and scary to fear besides crackheads and crackfiends. Or is there? Nah, probably not.
For a full description of crackfiends and crackheads, see the Crack Mansion page.