As he has almost every day for the past 20 years, Arturo Rubalcaba walks about a block from his apartment in Boyle Heights to Mariachi Plaza. It’s mostly empty except for a few mariachis wearing black suits embellished with silver buttons and white embroidery. Rubalcaba sits and waits for clients to arrive. Rubalcaba is a mariachi. And this is a tradition that dates back to the 1930s, but the jump in housing prices is putting that tradition at risk. Aired on KCRW's Morning Edition.