It’s just a few exits south of downtown under the majestic San Diego/Coronado Bay Bridge, but for many in San Diego, Chicano Park in the community of Barrio Logan may seem like a world away. That makes it the perfect spot for this year’s Trolley Dances, which begins at the Barrio Logan Trolley Station and runs for two weekends, Sept. 28 and 29, Oct. 5 and 6.