Singles yearning for love aren’t the only ones finding success with mobile dating apps.Music festivals, endurance sports and other properties are increasingly finding a match with online dating sites and mobile dating apps.Spritzr this year has partnered with three properties in California: the Zappos.com Bay to Breakers footrace in San Francisco, Bottlerock music festival in Napa Valley, and the Abbot Kinney Festival in Los Angeles.The sponsorships build on a handful of current and former...