NANCY CARR * My recent stroll down South Congress in Austin proved again that the Beatles are everywhere. I especially liked Sgt. Pepper’s Day of the Dead Club Band at the Mi Casa folk art shop. The prize for sheer oddness goes to the St. Vincent De Paul thrift shop, which has John Lennon, rendered in chalk, presiding over the linen department. And “smile even if you don’t want to” strikes me as one of the mottoes Paul McCartney lives by.