Los Angeles-based Goldstar, an online service which helps users connect with half price event, music, and other tickets, has launched in Seattle, the firm told its users today. Goldstar, which is headed by Jim McCarthy, said it is now offering tickets from more than a dozen Seattle venues. The service launched in the city last Tuesday. Goldstar offers half price tickets to upcoming events such as concerts and plays, to help venues fill their seats; the firm takes a cut of ticket sales. The company also sells tickets in Los Angeles, San Diego, Orange County, Boston, Chicago, Las Vegas, New York, San Francisco, San Jose, and the DC Metro area. McCarthy and his co-founders were all previously at Kiko, Inc.