I've been doing yoga on and off since 2003 and regularly for the past five years. I've been to four different studios and had six different instructors. I'm not terribly athletic and some yoga classes I've taken in the past have been way too strenuous for me.
I go to Jude's Yin Yoga class on Wednesday nights and this style is more to my liking; it's more about holding stretches for longer periods instead of the near-cardio workout that I've experienced elsewhere. I have some back problems and frequent headaches; these classes have helped me a lot and I've started to see improvements in my posture and flexibility.
These classes are very popular and have good turnout. I try to show up around 20 minutes before class so I can get my preferred spot as there is usually a full house.
There's also covered parking which is great to have during the summer.