TenPoint5 is the best- I've NEVER been into working out and am now totally addicted to this place. The instructors are motivating, yet approachable. Its a comfortable atmosphere and a rocking workout.
The hour flies by; you'll definitely feel you earned a second glass of wine for attending. My one piece of advice- don't fear the warm up, once you get through that you are golden. The reward is feeling like you're in an awesome scene from Center Stage for the next 45 minutes, and a fair amount of glorious stretching!