I've been IP twice, but both times in a "normal" hospital. I wasnt even in the psych ward.
The first time was to get my meds started. I was only there for 3 days/2 nights. I saw my psychiatrist daily, and he also introduced me to a T, who I also saw daily, and continued to see after I left.
About 6 weeks later i took myself back to the hospital after I OD'd. Again 3 days/2 nights. On the second night they came at 11PM or so to move me from the general ward to the psych ward. Seemed a bit pointless at that stage.

But in a "normal" hospital, it almost seemed a waste of time. See your T once a day, pdoc once a day, nurses do blood pressure 3 times a day, 3 meals a day, I could walk around where I wanted to and otherwise slept.
Not sure how much it helped me; hence I am a bit apprehensive to go again.
There are "clinics" here too, but they are more for 4 week+ stays, with nurses onsite, pdoc and T, group therapy...