On-demand grocery delivery service Instacart has expanded in Los Angeles, saying recently that it is now covering downtown Los Angeles and Culver City, and will deliver groceries from Ralphs and Costco. The company--which launched earlier in April in Los Angeles--offers up personal shopping services driven by crowdsourcing. The company joins other similar, peer-to-peer marketplace companies like Uber, Handybook, DogVacay, TakeLessons, and Homehero, all of whom have made Los Angeles a major focus of their efforts. Instacart is based in San Francisco, and helps connect "personal shoppers" who shop for groceries and deliver them to customers using their own transportation. The company has been active in Los Angeles since April 3rd. The company said it now covers Downtown Los Angeles, Culver City, West Hollywood, Hollywood, Fairfax, Beverly Grove, Sawtelle, West LA, Mid-Wilshire, Santa Monica, Venice and Marina Del Rey.