My answer is the rack of prom dresses and formal gowns. The reason is my strong attraction to the heightened femininity expressed by such clothes. Designed for special occasions, they crank up the muliebrity dial.
I discovered this store-area is ignored because adult women don't look for prom dresses and, if they're going to wear a fancy ball gown, they buy new; they don't want a used one. With few shopping-competitors, I'm able to find terrific dresses at steeply discounted prices. Whatever premium is charged for these fancy clothes, thrift-stores have trouble selling them for more than $10 which is what I usually steal them for. The garments probably cost hundreds of dollars new.
Pictured below is a recent find ($9). I love its off-the-shoulder sleeves, elegant shape and glittery edging. I strove to accessorize it right and spent a very long time on makeup. (Today is a relaxed Saturday which I'm devoting to girly pleasures.)
What section of thrift-stores do you enjoy the most?