This week on A Prairie Home Companion with Garrison Keillor, a winter rebroadcast of a show originally from January 2013, at the War Memorial Opera House in San Francisco, California. Elvin Bishop and his band play "Got to Be New Orleans," Michael Tilson Thomas sings "Who Do You Suppose Went and Married My Sister? Thomashefsky!" and Laurie Lewis joins Garrison on "Ripple." In Lake Wobegon, texting disrupts a choir concert.