Los Angeles loves Halloween. If you visit LA in October, expect your trip to overflow with haunted houses, horror movie nights and costume parties. If you're here anytime over the Halloween weekend, you will need a costume. Didn't pack anything spooky? That's okay. Just as there's no shortage of Halloween parties in LA, there's no lack of costumes. From the costume shops that clothe Hollywood to thrift stores, there's a bounty of holiday wear for all budgets.