I have never been in a Half-Way House ... but I have known people who have been. (I, myself, am nearly 3 years recovered from a Meth addiction. However, I did it all on my own, no houses, no rehab, no doctors ... just my own will-power.) Half-Way Houses are usually set up to specialize in some particular area, such as alcohol addiction, substance addiction, abuse-recovery, etc. So, it really depends on your friends situation, as to which type of house they need to be looking into.