What Happened? Didn't There Used To Be 3 Monk Styles? What Happened To The Harmonious Style?

When the "class revamps" came around, the devs merged the Harmonious monk into the main monk line. So you will have alot of abilities you remember. So you'll have two Aums to learn abilities from as you level up. (You might want to hit that a few times btw.) One will be Harmonious, and the other will be Drunken or Dragon. With this merger of the Harmonious, it beefed up monks quite a bit (especially in spike dps), and soloing is alot easier as well.

Can go to Khal and pick, I know that drunken sends you off to Ksaravi Gulch.

The quest NPC for changing monk styles is in West Khal.  He is under a tent in the field between the two faction mount areas (more southern/just north of the  xarkin mounts).

The drunken monk will send you to Ksvari Gulch, as Himminy stated.  The Dragon monk quest will send you Maji Hold.  To change styles, you will have to visit all three masters, so you will go to KG, MH, and CB (hold harmony monk master) first. ~Excerpt taken from SoE VG forums~