At Mai's Nail Perfection, a converted house on Sunset Boulevard, everything is purple. When you get a pedicure, you sit on a purple throne, surrounded by purple walls. You'll feel like a queen, unless you don't take good care of your feet -- in which case Mai will chastise you and make you feel like a naughty little girl (or boy). The place is best known for its long-lasting French manicures -- it'll be a while before you need a touch-up if you trust yourself to Mai. Although lots of the joint's regulars hail from the surrounding West University and Southampton areas, there's a decidedly laid-back, un-snobby feel to the place. And if you're in the market for costume jewelry, the entrepreneurial Mai has a side biz going right at the salon.