Free Haircuts.. Forever!
Fairly simple.

1. Queue for a random dungeon.
2. Sit in the barber’s chair, pick out your new hairstyle.
3. Wait for dungeon queue to pop.
4. Accept your dungeon group, and you’ve just received a free hair color/cut.

This is only client sided and it will reset after you get out of the instance. You also get to keep your barber’s bib!