There seems to be a yogurt place popping up everywhere. They all seem to be a copy of Pinkberry from California. When this place first opened last year i found myself there almost everyday. The average price I spend there is about $5.50 on my yogurt. It does get a little pricy when you start adding in fruit and mochi because it's all sold by weight.
I'm into the tart yogut. My favorite is the watermelon. The service isn't very good here though. It's usually ok most times but a few of the staff members aren't very helpful and you can just tell they don't want to be there.