The woman wore brown leather hot pants, a beige silk blouse, dangly earrings and over-the-knee black heeled boots. Thankfully, she was thin. Her partner, also in his late 20s, wore grungy jeans and an expensive leather jacket whose collar hit his rock-star-length locks. Next to them was an elderly Hispanic grandmother trying to keep tabs on three grade-schoolers, most likely children of her working daughter or son. An elderly blond women, her face the work of a terrific plastic surgeon, stood comfortably in very high-heeled shoes. Her Channel sunglasses matched the color of her Fendi handbag. Added to the mix was a teenage male covered in tattoos, wearing black flannel Turkish pants and a sleeveless matching top, despite the 72-degree weather. Each shopper’s cart was brimming, all with very different mixes of merchandise and groceries. Welcome to Costco where you feel you are…