Being relatively new to yoga, my sister and I bought a Groupon to Puma Yoga and tried it out throughout the summer. After our passes were expired we both signed on for a year long membership, we enjoyed it so much. The classes are small, the space is incredibly clean and welcoming, and the instructors are amazing. Even the owner, Puma, will take the time to welcome each person individually to class and ask your name if she has just met you, and Laurie is possibly the nicest, most friendly and funny instructor I have ever had for any workout and I have only gone to about 3 of her classes. Tammy will wow you with her intelligence and how she blends Yoga and the brain. I could go on...
No one there is pretentious so it is a great place for a beginner if you aren't too sure what you are doing yet.
Check out their drop in classes which are only $5, or sign up for a pass for a few classes to try it out, you will thank yourself over and over!