The only problem I see is you may have to get clarity on the following lines:
When using a controlled rage, an urban barbarian gains no bonus on Will saves, takes no penalties to AC, and can still use Intelligence-,
Dexterity-, and Charisma-based skills. This ability otherwise follows the normal rules for rage.
While in rage, a barbarian cannot use any Charisma-, Dexterity-, or Intelligence-based skills (except Acrobatics, Fly, Intimidate, and Ride) or any ability that requires patience or concentration.
Some DMs may rule that a dervish dance is an ability that requires patience or concentration.