Who are halfway houses for?

Well, actually, halfway houses are looked at in two ways. First, they are simple stops about midway through a journey. For instance, if you take a long road trip and stop at a hotel - this would be considered a halfway house. The other (more common) reference for a halfway house is a rehab center where a person goes after having been institutionalized (via jail, hospitals, etc) to help adjust or re-adjust to living in the "outside world."