Reviewed by Sam Thielman
In his solo show <cite>Juan and John</cite>, Roger Guenveur Smith digs up disparate parts of the 1960s and knits them together into a Frankensteinian whole. The writer-performer takes a hard look at the Los Angeles race riots, the home-front horrors of the Vietnam war, and an infamous baseball game's sudden violence between the Giants' Juan Marichal and the Dodgers' John Roseboro. While Smith's writing is impressivel…