Coffee Shops: If you like to sip coffee, then become a regular in the neighborhood coffee shops. Once you build rapport and make acquaintances, then chatting up any new people become easier. See who catches your eye.
Bars & Nightlife: If you are in LA, then do not miss the Friends Bar, where you can meet a lot of cool people. Aim for the pack of single women as a guy, as that increases chances to see if one of them is attracted to you. Explore the night life in the city you are in. You can pick out the places for the next night trip.