My favorite frozen yogurt place around.
There's a large selection of self serve flavors and condiments.
My favorite is Taro yogurt with Red Bean topping, maybe add a few Cap'n Crunch pieces for crisp texture. Red Beans are almost like candy in Asia... it's so nice to have a healthy but sweet topping available. No other frozen yogurt place offers it.
You pay by the ounce, not by the item.
My only caveat is that the staff should know when it's OK to kick someone out. About a year ago there was an obviously stoned/drunk person sitting there in a daze with drool dripping out of his mouth... then a few minutes later he barfed all over the place. Not a pleasant sight to see when you're eating yogurt, and that incident turned me off from yogurt for the good part of a year.