Charles GabreanLaurie Anderson's backing guitarist. Lou something."Have you ever been given meditation instructions at a concert before?" the emcee asked as the crowd sat down at Chandler Center for the Arts to witness a benefit concert by Velvet Underground legend Lou Reed, his wife, performance artist Laurie Anderson.We had not, but that quickly changed. It was just one odd moment in an afternoon filled with them at the show, which benefited the Yongey Peace Prevails Center, run by Reed and An